treewide: remove unused variables (#63177)

* treewide: remove unused variables * making ofborg happy
author: volth <volth@volth.com> 2019-06-16 19:59:06 +0000
committer: Alyssa Ross <hi@alyssa.is> 2019-06-16 19:59:05 +0000
commit: f3282c8d1e0ce6ba5d9f6aeddcfad51d879c7a4a (patch)
tree: fc248141d976626274065a36839f64bd2dd3db99 /pkgs/development
parent: ccee4117be08f0474640e06f76a7881389fb7b47 (diff)
351 files changed, 268 insertions, 418 deletions
diff --git a/pkgs/development/androidndk-pkgs/androidndk-pkgs.nix b/pkgs/development/androidndk-pkgs/androidndk-pkgs.nix
index cca0f0d4adbc..fcdd2eb51811 100644
--- a/pkgs/development/androidndk-pkgs/androidndk-pkgs.nix
+++ b/pkgs/development/androidndk-pkgs/androidndk-pkgs.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv
+{ stdenv
 , makeWrapper
 , runCommand, wrapBintoolsWith, wrapCCWith
 , buildAndroidndk, androidndk, targetAndroidndkPkgs
diff --git a/pkgs/development/androidndk-pkgs/default.nix b/pkgs/development/androidndk-pkgs/default.nix
index 341cdf72028d..e35444ed516e 100644
--- a/pkgs/development/androidndk-pkgs/default.nix
+++ b/pkgs/development/androidndk-pkgs/default.nix
@@ -1,5 +1,4 @@
 { androidenv, buildPackages, pkgs, targetPackages
-, includeSources ? true, licenseAccepted ? false
 }:
 
 rec {
@@ -21,7 +20,7 @@ rec {
       inherit (buildPackages)
         makeWrapper;
       inherit (pkgs)
-        lib stdenv
+        stdenv
         runCommand wrapBintoolsWith wrapCCWith;
       # buildPackages.foo rather than buildPackages.buildPackages.foo would work,
       # but for splicing messing up on infinite recursion for the variants we
diff --git a/pkgs/development/arduino/arduino-mk/default.nix b/pkgs/development/arduino/arduino-mk/default.nix
index 9cefd1dfe54f..2178226ab9d3 100644
--- a/pkgs/development/arduino/arduino-mk/default.nix
+++ b/pkgs/development/arduino/arduino-mk/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub }:
+{ stdenv, fetchFromGitHub }:
 
 stdenv.mkDerivation rec {
   version = "1.6.0";
diff --git a/pkgs/development/beam-modules/fetch-rebar-deps.nix b/pkgs/development/beam-modules/fetch-rebar-deps.nix
index a94d803f0d32..389e07beca6c 100644
--- a/pkgs/development/beam-modules/fetch-rebar-deps.nix
+++ b/pkgs/development/beam-modules/fetch-rebar-deps.nix
@@ -1,4 +1,4 @@
-{ stdenv, rebar3, curl }:
+{ stdenv, rebar3 }:
 
 { name, version, sha256, src
 , meta ? {}
@@ -29,4 +29,5 @@ stdenv.mkDerivation ({
   outputHash = sha256;
 
   impureEnvVars = stdenv.lib.fetchers.proxyImpureEnvVars;
+  inherit meta;
 })
diff --git a/pkgs/development/beam-modules/rebar3-release.nix b/pkgs/development/beam-modules/rebar3-release.nix
index 837d0ccf15cf..1ec9f244d6c1 100644
--- a/pkgs/development/beam-modules/rebar3-release.nix
+++ b/pkgs/development/beam-modules/rebar3-release.nix
@@ -1,5 +1,5 @@
-{ stdenv, writeText, erlang, rebar3, openssl, libyaml,
-  pc, lib }:
+{ stdenv, writeText, erlang, rebar3, openssl,
+  lib }:
 
 { name, version
 , src
@@ -18,8 +18,6 @@
 with stdenv.lib;
 
 let
-  debugInfoFlag = lib.optionalString (enableDebugInfo || erlang.debugInfo) "debug-info";
-
   shell = drv: stdenv.mkDerivation {
           name = "interactive-shell-${drv.name}";
           buildInputs = [ drv ];
diff --git a/pkgs/development/compilers/chicken/5/eggs.nix b/pkgs/development/compilers/chicken/5/eggs.nix
index 04f7551f32d9..2d3324ceaca4 100644
--- a/pkgs/development/compilers/chicken/5/eggs.nix
+++ b/pkgs/development/compilers/chicken/5/eggs.nix
@@ -1,4 +1,4 @@
-{ pkgs, stdenv }:
+{ pkgs }:
 rec {
   inherit (pkgs) eggDerivation fetchegg;
 
diff --git a/pkgs/development/compilers/compcert/default.nix b/pkgs/development/compilers/compcert/default.nix
index 4538d3031489..33957b5a8dcf 100644
--- a/pkgs/development/compilers/compcert/default.nix
+++ b/pkgs/development/compilers/compcert/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, fetchpatch, makeWrapper
+{ stdenv, lib, fetchFromGitHub, makeWrapper
 , coq, ocamlPackages, coq2html
 , tools ? stdenv.cc
 }:
diff --git a/pkgs/development/compilers/dmd/default.nix b/pkgs/development/compilers/dmd/default.nix
index 7b85b3e85ba4..b3b58e836215 100644
--- a/pkgs/development/compilers/dmd/default.nix
+++ b/pkgs/development/compilers/dmd/default.nix
@@ -1,7 +1,7 @@
-{ stdenv, lib, fetchFromGitHub, fetchpatch
+{ stdenv, lib, fetchFromGitHub
 , makeWrapper, unzip, which, writeTextFile
 , curl, tzdata, gdb, darwin, git
-, callPackage, targetPackages, ldc
+, targetPackages, ldc
 , version ? "2.085.1"
 , dmdSha256 ? "0ccidfcawrcwdpfjwjiln5xwr4ffp8i2hwx52p8zn3xmc5yxm660"
 , druntimeSha256 ? "109f2glsqrlshk06761xlw4r5v22mivp873cq9g5gcax3g00k617"
diff --git a/pkgs/development/compilers/elm/default.nix b/pkgs/development/compilers/elm/default.nix
index f14bce5d96b3..cd91ea6478db 100644
--- a/pkgs/development/compilers/elm/default.nix
+++ b/pkgs/development/compilers/elm/default.nix
@@ -1,6 +1,6 @@
-{ lib, stdenv, buildEnv
+{ lib, stdenv
 , haskell, nodejs
-, fetchurl, fetchpatch, makeWrapper, git }:
+, fetchurl, fetchpatch, makeWrapper }:
 
 let
   fetchElmDeps = import ./fetchElmDeps.nix { inherit stdenv lib fetchurl; };
diff --git a/pkgs/development/compilers/factor-lang/default.nix b/pkgs/development/compilers/factor-lang/default.nix
index 65fb8a9c82dd..0f9a1a94bcc9 100644
--- a/pkgs/development/compilers/factor-lang/default.nix
+++ b/pkgs/development/compilers/factor-lang/default.nix
@@ -1,12 +1,9 @@
-{ stdenv, fetchurl, glib, glibc, git,
+{ stdenv, fetchurl, glib, git,
   rlwrap, curl, pkgconfig, perl, makeWrapper, tzdata, ncurses,
   pango, cairo, gtk2, gdk_pixbuf, gtkglext,
   mesa, xorg, openssl, unzip }:
 
-let
-  inherit (stdenv.lib) optional;
-
-in stdenv.mkDerivation rec {
+stdenv.mkDerivation rec {
   name = "factor-lang-${version}";
   version = "0.98";
   rev = "7999e72aecc3c5bc4019d43dc4697f49678cc3b4";
diff --git a/pkgs/development/compilers/ghc/8.8.1.nix b/pkgs/development/compilers/ghc/8.8.1.nix
index c180dc6ac861..dce1879ebd00 100644
--- a/pkgs/development/compilers/ghc/8.8.1.nix
+++ b/pkgs/development/compilers/ghc/8.8.1.nix
@@ -2,7 +2,7 @@
 
 # build-tools
 , bootPkgs
-, autoconf, automake, coreutils, fetchurl, fetchpatch, perl, python3, m4, sphinx
+, autoconf, automake, coreutils, fetchurl, perl, python3, m4, sphinx
 , bash
 
 , libiconv ? null, ncurses
diff --git a/pkgs/development/compilers/ghc/head.nix b/pkgs/development/compilers/ghc/head.nix
index 141516015429..2edb49bd4633 100644
--- a/pkgs/development/compilers/ghc/head.nix
+++ b/pkgs/development/compilers/ghc/head.nix
@@ -2,7 +2,7 @@
 
 # build-tools
 , bootPkgs
-, autoconf, automake, coreutils, fetchgit, fetchurl, fetchpatch, perl, python3, m4, sphinx
+, autoconf, automake, coreutils, fetchgit, fetchpatch, perl, python3, m4, sphinx
 , bash
 
 , libiconv ? null, ncurses
diff --git a/pkgs/development/compilers/ghcjs-ng/8.6/dep-overrides.nix b/pkgs/development/compilers/ghcjs-ng/8.6/dep-overrides.nix
index 8681aceacd7f..53b6dd431342 100644
--- a/pkgs/development/compilers/ghcjs-ng/8.6/dep-overrides.nix
+++ b/pkgs/development/compilers/ghcjs-ng/8.6/dep-overrides.nix
@@ -1,6 +1,6 @@
 { haskellLib }:
 
-let inherit (haskellLib) dontCheck doJailbreak dontHaddock;
+let inherit (haskellLib) doJailbreak dontHaddock;
 in self: super: {
   haddock-library-ghcjs = doJailbreak super.haddock-library-ghcjs;
   haddock-api-ghcjs = doJailbreak (dontHaddock super.haddock-api-ghcjs);
diff --git a/pkgs/development/compilers/ghcjs/base.nix b/pkgs/development/compilers/ghcjs/base.nix
index 93e6a47934fc..e9c303b88b6e 100644
--- a/pkgs/development/compilers/ghcjs/base.nix
+++ b/pkgs/development/compilers/ghcjs/base.nix
@@ -29,7 +29,7 @@
 , lens
 , parallel, safe, shelly, split, stringsearch, syb
 , tar, terminfo
-, vector, yaml, fetchgit, fetchFromGitHub
+, vector, yaml
 , alex, happy, git, gnumake, autoconf, patch
 , automake, libtool
 , cryptohash
diff --git a/pkgs/development/compilers/glslang/default.nix b/pkgs/development/compilers/glslang/default.nix
index 784d66a0f242..3c46dfc107b8 100644
--- a/pkgs/development/compilers/glslang/default.nix
+++ b/pkgs/development/compilers/glslang/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchpatch, cmake, bison, jq, python, spirv-tools, spirv-headers }:
+{ stdenv, fetchFromGitHub, cmake, bison, jq, python, spirv-tools, spirv-headers }:
 stdenv.mkDerivation rec {
   name = "glslang-${version}";
   version = "7.11.3113";
diff --git a/pkgs/development/compilers/go-jsonnet/default.nix b/pkgs/development/compilers/go-jsonnet/default.nix
index 1001aac8306d..69507685f29b 100644
--- a/pkgs/development/compilers/go-jsonnet/default.nix
+++ b/pkgs/development/compilers/go-jsonnet/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "go-jsonnet-${version}";
diff --git a/pkgs/development/compilers/go/1.10.nix b/pkgs/development/compilers/go/1.10.nix
index d18d260b5058..39de36293c8e 100644
--- a/pkgs/development/compilers/go/1.10.nix
+++ b/pkgs/development/compilers/go/1.10.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchFromGitHub, tzdata, iana-etc, go_bootstrap, runCommand, writeScriptBin
-, perl, which, pkgconfig, patch, procps, pcre, cacert, llvm, Security, Foundation
+, perl, which, pkgconfig, patch, procps, pcre, cacert, Security, Foundation
 , fetchpatch
 }:
 
diff --git a/pkgs/development/compilers/go/1.11.nix b/pkgs/development/compilers/go/1.11.nix
index b545e25d8011..d29e3f3c8669 100644
--- a/pkgs/development/compilers/go/1.11.nix
+++ b/pkgs/development/compilers/go/1.11.nix
@@ -1,5 +1,5 @@
-{ stdenv, fetchurl, tzdata, iana-etc, go_bootstrap, runCommand, writeScriptBin
-, perl, which, pkgconfig, patch, procps, pcre, cacert, llvm, Security, Foundation
+{ stdenv, fetchurl, tzdata, iana-etc, runCommand
+, perl, which, pkgconfig, patch, procps, pcre, cacert, Security, Foundation
 , mailcap, runtimeShell
 , buildPackages, pkgsTargetTarget
 }:
diff --git a/pkgs/development/compilers/go/1.12.nix b/pkgs/development/compilers/go/1.12.nix
index 7fee3b234087..cbd362938260 100644
--- a/pkgs/development/compilers/go/1.12.nix
+++ b/pkgs/development/compilers/go/1.12.nix
@@ -1,5 +1,5 @@
-{ stdenv, fetchurl, tzdata, iana-etc, go_bootstrap, runCommand, writeScriptBin
-, perl, which, pkgconfig, patch, procps, pcre, cacert, llvm, Security, Foundation
+{ stdenv, fetchurl, tzdata, iana-etc, runCommand
+, perl, which, pkgconfig, patch, procps, pcre, cacert, Security, Foundation
 , mailcap, runtimeShell
 , buildPackages, pkgsTargetTarget
 }:
diff --git a/pkgs/development/compilers/graalvm/default.nix b/pkgs/development/compilers/graalvm/default.nix
index 3cb0d7430ab3..b30f47c08e50 100644
--- a/pkgs/development/compilers/graalvm/default.nix
+++ b/pkgs/development/compilers/graalvm/default.nix
@@ -6,10 +6,6 @@
 let
   version = "1.0.0-rc15";
   truffleMake = ./truffle.make;
-  R = fetchurl {
-    url = "http://cran.rstudio.com/src/base/R-3/R-3.5.1.tar.gz";
-    sha256 = "1vap2k8kj5icy9naw61f9zyphf4rs0c9rxvil0zxkwx0xvsvyqq4";
-  };
   makeMxGitCache = list: out: ''
      mkdir ${out}
     ${lib.concatMapStrings ({ url, name, rev, sha256 }: ''
diff --git a/pkgs/development/compilers/ispc/default.nix b/pkgs/development/compilers/ispc/default.nix
index 2657ee6633b7..1cbe95232eb7 100644
--- a/pkgs/development/compilers/ispc/default.nix
+++ b/pkgs/development/compilers/ispc/default.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchFromGitHub, fetchpatch, which, m4, python, bison, flex, llvmPackages,
+{stdenv, fetchFromGitHub, which, m4, python, bison, flex, llvmPackages,
 testedTargets ? ["sse2" "host"] # the default test target is sse4, but that is not supported by all Hydra agents
 }:
 
diff --git a/pkgs/development/compilers/julia/shared.nix b/pkgs/development/compilers/julia/shared.nix
index 131b72624842..d8d521952bda 100644
--- a/pkgs/development/compilers/julia/shared.nix
+++ b/pkgs/development/compilers/julia/shared.nix
@@ -9,7 +9,7 @@
 { stdenv, fetchurl, fetchzip
 # build tools
 , gfortran, m4, makeWrapper, patchelf, perl, which, python2
-, llvm, cmake
+, cmake
 # libjulia dependencies
 , libunwind, readline, utf8proc, zlib
 # standard library dependencies
diff --git a/pkgs/development/compilers/llvm/5/llvm.nix b/pkgs/development/compilers/llvm/5/llvm.nix
index d6839f0f2909..122576cc726e 100644
--- a/pkgs/development/compilers/llvm/5/llvm.nix
+++ b/pkgs/development/compilers/llvm/5/llvm.nix
@@ -9,7 +9,6 @@
 , version
 , release_version
 , zlib
-, libcxxabi
 , debugVersion ? false
 , enableManpages ? false
 , enableSharedLibraries ? !enableManpages
diff --git a/pkgs/development/compilers/llvm/8/clang/default.nix b/pkgs/development/compilers/llvm/8/clang/default.nix
index c0a0e0851450..5a8b8922eb06 100644
--- a/pkgs/development/compilers/llvm/8/clang/default.nix
+++ b/pkgs/development/compilers/llvm/8/clang/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetch, fetchpatch, cmake, libxml2, llvm, version, clang-tools-extra_src, python
+{ stdenv, fetch, cmake, libxml2, llvm, version, clang-tools-extra_src, python
 , fixDarwinDylibNames
 , enableManpages ? false
 , enablePolly ? false # TODO: get this info from llvm (passthru?)
diff --git a/pkgs/development/compilers/llvm/8/libunwind.nix b/pkgs/development/compilers/llvm/8/libunwind.nix
index a187d0adc994..a4ceb9102ef8 100644
--- a/pkgs/development/compilers/llvm/8/libunwind.nix
+++ b/pkgs/development/compilers/llvm/8/libunwind.nix
@@ -1,4 +1,4 @@
-{ stdenv, version, fetch, cmake, libcxx, fetchpatch }:
+{ stdenv, version, fetch, cmake, fetchpatch }:
 
 stdenv.mkDerivation {
   name = "libunwind-${version}";
diff --git a/pkgs/development/compilers/llvm/8/llvm.nix b/pkgs/development/compilers/llvm/8/llvm.nix
index 5d8d08167298..4ff6cc995a02 100644
--- a/pkgs/development/compilers/llvm/8/llvm.nix
+++ b/pkgs/development/compilers/llvm/8/llvm.nix
@@ -1,6 +1,5 @@
 { stdenv
 , fetch
-, fetchpatch
 , cmake
 , python
 , libffi
diff --git a/pkgs/development/compilers/nim/default.nix b/pkgs/development/compilers/nim/default.nix
index 0d319d235fd3..aaf45ac36f6d 100644
--- a/pkgs/development/compilers/nim/default.nix
+++ b/pkgs/development/compilers/nim/default.nix
@@ -62,7 +62,6 @@ stdenv.mkDerivation rec {
   patchPhase =
     let disableTest = ''sed -i '1i discard \"\"\"\n  disabled: true\n\"\"\"\n\n' '';
         disableStdLibTest = ''sed -i -e '/^when isMainModule/,/^END$/{s/^/#/}' '';
-        disableCompile = ''sed -i -e 's/^/#/' '';
     in ''
       substituteInPlace ./tests/async/tioselectors.nim --replace "/bin/sleep" "sleep"
       substituteInPlace ./tests/osproc/tworkingdir.nim --replace "/usr/bin" "${coreutils}/bin"
diff --git a/pkgs/development/compilers/openjdk/11.nix b/pkgs/development/compilers/openjdk/11.nix
index 5840061ed53e..415dacc662ab 100644
--- a/pkgs/development/compilers/openjdk/11.nix
+++ b/pkgs/development/compilers/openjdk/11.nix
@@ -1,5 +1,5 @@
 { stdenv, lib, fetchurl, bash, cpio, autoconf, pkgconfig, file, which, unzip, zip, cups, freetype
-, alsaLib, bootjdk, perl, liberation_ttf, fontconfig, zlib, lndir
+, alsaLib, bootjdk, perl, fontconfig, zlib, lndir
 , libX11, libICE, libXrender, libXext, libXt, libXtst, libXi, libXinerama, libXcursor, libXrandr
 , libjpeg, giflib
 , setJavaClassPath
diff --git a/pkgs/development/compilers/openspin/default.nix b/pkgs/development/compilers/openspin/default.nix
index 71bda3e03d96..690707265b4a 100644
--- a/pkgs/development/compilers/openspin/default.nix
+++ b/pkgs/development/compilers/openspin/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchFromGitHub }:
+{ stdenv, fetchFromGitHub }:
 
 stdenv.mkDerivation rec {
   name = "openspin-${version}";
diff --git a/pkgs/development/compilers/rust/default.nix b/pkgs/development/compilers/rust/default.nix
index 5c3c08952074..0e3de0c4ab98 100644
--- a/pkgs/development/compilers/rust/default.nix
+++ b/pkgs/development/compilers/rust/default.nix
@@ -1,9 +1,9 @@
-{ stdenv, lib, overrideCC
+{ stdenv, lib
 , buildPackages
 , newScope, callPackage
 , CoreFoundation, Security
 , llvmPackages_5
-, pkgsBuildTarget, pkgsBuildBuild, pkgsBuildHost
+, pkgsBuildTarget, pkgsBuildBuild
 }: rec {
   makeRustPlatform = { rustc, cargo, ... }: {
     rust = {
diff --git a/pkgs/development/compilers/rust/rustc.nix b/pkgs/development/compilers/rust/rustc.nix
index 59264ca6efad..fb658afe07e8 100644
--- a/pkgs/development/compilers/rust/rustc.nix
+++ b/pkgs/development/compilers/rust/rustc.nix
@@ -1,6 +1,6 @@
 { stdenv, removeReferencesTo, pkgsBuildBuild, pkgsBuildHost, pkgsBuildTarget
-, fetchurl, fetchgit, fetchzip, file, python2, tzdata, ps
-, llvm_7, ncurses, darwin, git, cmake, curl, rustPlatform
+, fetchurl, file, python2, tzdata, ps
+, llvm_7, darwin, git, cmake, rustPlatform
 , which, libffi, gdb
 , withBundledLLVM ? false
 }:
diff --git a/pkgs/development/compilers/swi-prolog/default.nix b/pkgs/development/compilers/swi-prolog/default.nix
index 97b4a627540c..bf452d21d1dc 100644
--- a/pkgs/development/compilers/swi-prolog/default.nix
+++ b/pkgs/development/compilers/swi-prolog/default.nix
@@ -1,5 +1,5 @@
-{ stdenv, fetchgit, jdk, gmp, readline, openssl, libjpeg, unixODBC, zlib
-, libXinerama, libarchive, db, pcre, libedit, libossp_uuid, libXft, libXpm
+{ stdenv, fetchgit, jdk, gmp, readline, openssl, unixODBC, zlib
+, libarchive, db, pcre, libedit, libossp_uuid, libXpm
 , libSM, libXt, freetype, pkgconfig, fontconfig, makeWrapper ? stdenv.isDarwin
 , git, cacert, cmake, libyaml
 , extraLibraries ? [ jdk unixODBC libXpm libSM libXt freetype fontconfig ]
diff --git a/pkgs/development/compilers/swift/default.nix b/pkgs/development/compilers/swift/default.nix
index 33f4d2a33fce..94d0a4327d9d 100644
--- a/pkgs/development/compilers/swift/default.nix
+++ b/pkgs/development/compilers/swift/default.nix
@@ -1,5 +1,4 @@
 { stdenv
-, targetPackages
 , cmake
 , coreutils
 , glibc
diff --git a/pkgs/development/compilers/vala/default.nix b/pkgs/development/compilers/vala/default.nix
index 6da9d6d3d02d..6400f6e13875 100644
--- a/pkgs/development/compilers/vala/default.nix
+++ b/pkgs/development/compilers/vala/default.nix
@@ -1,5 +1,5 @@
-{ stdenv, lib, fetchurl, fetchpatch, pkgconfig, flex, bison, libxslt, autoconf, automake, autoreconfHook
-, graphviz, glib, libiconv, libintl, libtool, expat, substituteAll, gnome3
+{ stdenv, lib, fetchurl, fetchpatch, pkgconfig, flex, bison, libxslt, autoconf, autoreconfHook
+, graphviz, glib, libiconv, libintl, libtool, expat, substituteAll
 }:
 
 let
diff --git a/pkgs/development/compilers/x11basic/default.nix b/pkgs/development/compilers/x11basic/default.nix
index a26bc41c5945..88666148da3f 100644
--- a/pkgs/development/compilers/x11basic/default.nix
+++ b/pkgs/development/compilers/x11basic/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub
+{ stdenv, fetchFromGitHub
 , automake, autoconf, readline
 , libX11, bluez, SDL2
 }:
diff --git a/pkgs/development/coq-modules/StructTact/default.nix b/pkgs/development/coq-modules/StructTact/default.nix
index 55d59b931404..e33b9427223e 100644
--- a/pkgs/development/coq-modules/StructTact/default.nix
+++ b/pkgs/development/coq-modules/StructTact/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, coq, mathcomp }:
+{ stdenv, fetchFromGitHub, coq }:
 
 let param =
   {
diff --git a/pkgs/development/coq-modules/ssreflect/default.nix b/pkgs/development/coq-modules/ssreflect/default.nix
index 1fcb7e2da8ae..01df38375efb 100644
--- a/pkgs/development/coq-modules/ssreflect/default.nix
+++ b/pkgs/development/coq-modules/ssreflect/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, coq, ncurses, which
+{ stdenv, coq, ncurses, which
 , graphviz, mathcomp, withDoc ? false
 }:
 
diff --git a/pkgs/development/haskell-modules/generic-builder.nix b/pkgs/development/haskell-modules/generic-builder.nix
index b2d7d0eaf9cb..87d3b5ae496c 100644
--- a/pkgs/development/haskell-modules/generic-builder.nix
+++ b/pkgs/development/haskell-modules/generic-builder.nix
@@ -96,7 +96,7 @@ assert stdenv.hostPlatform.isWindows -> enableStaticLibraries == false;
 let
 
   inherit (stdenv.lib) optional optionals optionalString versionOlder versionAtLeast
-                       concatStringsSep enableFeature optionalAttrs toUpper;
+                       concatStringsSep enableFeature optionalAttrs;
 
   isGhcjs = ghc.isGhcjs or false;
   isHaLVM = ghc.isHaLVM or false;
diff --git a/pkgs/development/haskell-modules/make-package-set.nix b/pkgs/development/haskell-modules/make-package-set.nix
index 04cbd88989a6..a4c040673487 100644
--- a/pkgs/development/haskell-modules/make-package-set.nix
+++ b/pkgs/development/haskell-modules/make-package-set.nix
@@ -187,7 +187,7 @@ in package-set { inherit pkgs stdenv callPackage; } self // {
     # for any version that has been released on hackage as opposed to only
     # versions released before whatever version of all-cabal-hashes you happen
     # to be currently using.
-    callHackageDirect = {pkg, ver, sha256}@args:
+    callHackageDirect = {pkg, ver, sha256}:
       let pkgver = "${pkg}-${ver}";
       in self.callCabal2nix pkg (pkgs.fetchzip {
            url = "mirror://hackage/${pkgver}/${pkgver}.tar.gz";
diff --git a/pkgs/development/interpreters/clojurescript/lumo/default.nix b/pkgs/development/interpreters/clojurescript/lumo/default.nix
index bc2d0e5be5a8..16f3e7f73e20 100644
--- a/pkgs/development/interpreters/clojurescript/lumo/default.nix
+++ b/pkgs/development/interpreters/clojurescript/lumo/default.nix
@@ -119,7 +119,6 @@ let # packageJSON=./package.json;
 
 
     cljdeps   = import ./deps.nix { inherit pkgs; };
-    cljpaths  = cljdeps.makePaths {};
     classp    = cljdeps.makeClasspaths {
                   extraClasspaths=["src/js" "src/cljs/bundled" "src/cljs/snapshot"];
                 };
diff --git a/pkgs/development/interpreters/lua-5/build-lua-package.nix b/pkgs/development/interpreters/lua-5/build-lua-package.nix
index bc41d86256b2..f383c7283698 100644
--- a/pkgs/development/interpreters/lua-5/build-lua-package.nix
+++ b/pkgs/development/interpreters/lua-5/build-lua-package.nix
@@ -1,7 +1,6 @@
 # Generic builder for lua packages
 { lib
 , lua
-, stdenv
 , wrapLua
 # Whether the derivation provides a lua module or not.
 , toLuaModule
diff --git a/pkgs/development/interpreters/lua-5/default.nix b/pkgs/development/interpreters/lua-5/default.nix
index fb709227180f..08645dfb77f3 100644
--- a/pkgs/development/interpreters/lua-5/default.nix
+++ b/pkgs/development/interpreters/lua-5/default.nix
@@ -59,7 +59,7 @@ in rec {
 
   luajit_2_1 = import ../luajit/2.1.nix {
     self = luajit_2_1;
-    inherit callPackage lib;
+    inherit callPackage;
   };
 
 }
diff --git a/pkgs/development/interpreters/lua-5/wrapper.nix b/pkgs/development/interpreters/lua-5/wrapper.nix
index 7f584c0f0aff..14bd4a416468 100644
--- a/pkgs/development/interpreters/lua-5/wrapper.nix
+++ b/pkgs/development/interpreters/lua-5/wrapper.nix
@@ -3,7 +3,6 @@
 , extraOutputsToInstall ? []
 , postBuild ? ""
 , ignoreCollisions ? false
-, lib
 , requiredLuaModules
 , makeWrapperArgs ? []
 }:
diff --git a/pkgs/development/interpreters/luajit/2.1.nix b/pkgs/development/interpreters/luajit/2.1.nix
index 0f223963132e..e8f1b8b338c4 100644
--- a/pkgs/development/interpreters/luajit/2.1.nix
+++ b/pkgs/development/interpreters/luajit/2.1.nix
@@ -1,4 +1,4 @@
-{ self, callPackage, lib }:
+{ self, callPackage }:
 callPackage ./default.nix {
   inherit self;
   version = "2.1.0-beta3";
diff --git a/pkgs/development/interpreters/luajit/default.nix b/pkgs/development/interpreters/luajit/default.nix
index abd1fda47cb6..7db8feb98e71 100644
--- a/pkgs/development/interpreters/luajit/default.nix
+++ b/pkgs/development/interpreters/luajit/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, buildPackages
+{ stdenv, fetchurl, buildPackages
 , name ? "luajit-${version}"
 , isStable
 , sha256
diff --git a/pkgs/development/interpreters/perl/wrapper.nix b/pkgs/development/interpreters/perl/wrapper.nix
index 9142a1f4fc36..95122aebf039 100644
--- a/pkgs/development/interpreters/perl/wrapper.nix
+++ b/pkgs/development/interpreters/perl/wrapper.nix
@@ -3,9 +3,7 @@
 , extraOutputsToInstall ? []
 , postBuild ? ""
 , ignoreCollisions ? false
-, lib
 , requiredPerlModules
-, makeWrapperArgs ? []
 }:
 
 # Create a perl executable that knows about additional packages.
diff --git a/pkgs/development/interpreters/python/build-python-package.nix b/pkgs/development/interpreters/python/build-python-package.nix
index 98322312f7f3..61c1186cef9e 100644
--- a/pkgs/development/interpreters/python/build-python-package.nix
+++ b/pkgs/development/interpreters/python/build-python-package.nix
@@ -23,7 +23,7 @@ let
   common = import ./build-python-package-common.nix { inherit python; };
   mkPythonDerivation = import ./mk-python-derivation.nix {
     inherit lib config python wrapPython setuptools unzip ensureNewerSourcesForZipFilesHook;
-    inherit toPythonModule namePrefix writeScript update-python-libraries;
+    inherit toPythonModule namePrefix update-python-libraries;
   };
 in
 
diff --git a/pkgs/development/interpreters/python/cpython/2.7/default.nix b/pkgs/development/interpreters/python/cpython/2.7/default.nix
index bc90d93a7e3d..e7d07b9ad1c0 100644
--- a/pkgs/development/interpreters/python/cpython/2.7/default.nix
+++ b/pkgs/development/interpreters/python/cpython/2.7/default.nix
@@ -10,7 +10,6 @@
 , sqlite
 , tcl ? null, tk ? null, tix ? null, xlibsWrapper ? null, libX11 ? null, x11Support ? false
 , zlib
-, callPackage
 , self
 , CF, configd, coreutils
 , python-setup-hook
diff --git a/pkgs/development/interpreters/python/cpython/default.nix b/pkgs/development/interpreters/python/cpython/default.nix
index 60ea3bdf4c7f..5eb7f3ec1661 100644
--- a/pkgs/development/interpreters/python/cpython/default.nix
+++ b/pkgs/development/interpreters/python/cpython/default.nix
@@ -10,7 +10,6 @@
 , sqlite
 , tcl ? null, tk ? null, tix ? null, libX11 ? null, xorgproto ? null, x11Support ? false
 , zlib
-, callPackage
 , self
 , CF, configd
 , python-setup-hook
diff --git a/pkgs/development/interpreters/python/mk-python-derivation.nix b/pkgs/development/interpreters/python/mk-python-derivation.nix
index b3561bcbb725..6a9e3d48bdb5 100644
--- a/pkgs/development/interpreters/python/mk-python-derivation.nix
+++ b/pkgs/development/interpreters/python/mk-python-derivation.nix
@@ -10,7 +10,6 @@
 # Whether the derivation provides a Python module or not.
 , toPythonModule
 , namePrefix
-, writeScript
 , update-python-libraries
 }:
 
diff --git a/pkgs/development/interpreters/python/pypy/default.nix b/pkgs/development/interpreters/python/pypy/default.nix
index 3cdc30b92340..42b652978bcc 100644
--- a/pkgs/development/interpreters/python/pypy/default.nix
+++ b/pkgs/development/interpreters/python/pypy/default.nix
@@ -1,7 +1,7 @@
 { stdenv, substituteAll, fetchurl
 , zlib ? null, zlibSupport ? true, bzip2, pkgconfig, libffi
 , sqlite, openssl, ncurses, python, expat, tcl, tk, tix, xlibsWrapper, libX11
-, callPackage, self, gdbm, db, lzma
+, self, gdbm, db, lzma
 , python-setup-hook
 # For the Python package set
 , packageOverrides ? (self: super: {})
diff --git a/pkgs/development/interpreters/python/pypy/prebuilt.nix b/pkgs/development/interpreters/python/pypy/prebuilt.nix
index 552f230ee712..6af198e65ead 100644
--- a/pkgs/development/interpreters/python/pypy/prebuilt.nix
+++ b/pkgs/development/interpreters/python/pypy/prebuilt.nix
@@ -41,8 +41,6 @@ let
 
   majorVersion = substring 0 1 pythonVersion;
 
-  setupHook = python-setup-hook sitePackages;
-
   deps = [
     bzip2
     zlib
diff --git a/pkgs/development/interpreters/racket/default.nix b/pkgs/development/interpreters/racket/default.nix
index c2147fb5f6a7..e37c43a0bd65 100644
--- a/pkgs/development/interpreters/racket/default.nix
+++ b/pkgs/development/interpreters/racket/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, makeFontsConf, makeWrapper
+{ stdenv, fetchurl, makeFontsConf
 , cacert
 , cairo, coreutils, fontconfig, freefont_ttf
 , glib, gmp
diff --git a/pkgs/development/interpreters/ruby/default.nix b/pkgs/development/interpreters/ruby/default.nix
index e6c8a123041a..4e617ce67eb9 100644
--- a/pkgs/development/interpreters/ruby/default.nix
+++ b/pkgs/development/interpreters/ruby/default.nix
@@ -1,5 +1,5 @@
 { stdenv, buildPackages, lib
-, fetchurl, fetchpatch, fetchFromSavannah, fetchFromGitHub
+, fetchurl, fetchFromSavannah, fetchFromGitHub
 , zlib, openssl, gdbm, ncurses, readline, groff, libyaml, libffi, autoreconfHook, bison
 , autoconf, libiconv, libobjc, libunwind, Foundation
 , buildEnv, bundler, bundix
@@ -11,7 +11,7 @@ let
   opString = lib.optionalString;
   patchSet = import ./rvm-patchsets.nix { inherit fetchFromGitHub; };
   config = import ./config.nix { inherit fetchFromSavannah; };
-  rubygems = import ./rubygems { inherit stdenv lib fetchurl fetchpatch; };
+  rubygems = import ./rubygems { inherit stdenv lib fetchurl; };
 
   # Contains the ruby version heuristics
   rubyVersion = import ./ruby-version.nix { inherit lib; };
@@ -32,7 +32,7 @@ let
     };
     self = lib.makeOverridable (
       { stdenv, buildPackages, lib
-      , fetchurl, fetchpatch, fetchFromSavannah, fetchFromGitHub
+      , fetchurl, fetchFromSavannah, fetchFromGitHub
       , useRailsExpress ? true
       , zlib, zlibSupport ? true
       , openssl, opensslSupport ? true
diff --git a/pkgs/development/interpreters/ruby/rubygems/default.nix b/pkgs/development/interpreters/ruby/rubygems/default.nix
index db28cbe28fae..b9548284355d 100644
--- a/pkgs/development/interpreters/ruby/rubygems/default.nix
+++ b/pkgs/development/interpreters/ruby/rubygems/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, fetchpatch }:
+{ stdenv, lib, fetchurl }:
 
 stdenv.mkDerivation rec {
   name = "rubygems";
diff --git a/pkgs/development/interpreters/spidermonkey/52.nix b/pkgs/development/interpreters/spidermonkey/52.nix
index feac99b2d8e5..2ec5923b0e1f 100644
--- a/pkgs/development/interpreters/spidermonkey/52.nix
+++ b/pkgs/development/interpreters/spidermonkey/52.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, autoconf213, pkgconfig, perl, python2, zip, which, readline, icu, zlib, nspr, buildPackages }:
+{ stdenv, fetchurl, fetchpatch, autoconf213, pkgconfig, perl, zip, which, readline, icu, zlib, nspr, buildPackages }:
 
 let
   version = "52.9.0";
diff --git a/pkgs/development/java-modules/build-maven-package.nix b/pkgs/development/java-modules/build-maven-package.nix
index 499b2c65b770..a7196c6e0314 100644
--- a/pkgs/development/java-modules/build-maven-package.nix
+++ b/pkgs/development/java-modules/build-maven-package.nix
@@ -5,7 +5,7 @@ with builtins;
 with stdenv.lib;
 
 let
-  mavenMinimal = import ./maven-minimal.nix { inherit pkgs stdenv maven; };
+  mavenMinimal = import ./maven-minimal.nix { inherit pkgs stdenv; };
 in stdenv.mkDerivation rec {
   inherit mavenDeps src name meta m2Path;
 
diff --git a/pkgs/development/java-modules/maven-minimal.nix b/pkgs/development/java-modules/maven-minimal.nix
index ca7cc7027be7..f63c91cd360a 100644
--- a/pkgs/development/java-modules/maven-minimal.nix
+++ b/pkgs/development/java-modules/maven-minimal.nix
@@ -1,4 +1,4 @@
-{ stdenv, pkgs, maven }:
+{ stdenv, pkgs }:
 
 with stdenv.lib;
 with pkgs.javaPackages;
diff --git a/pkgs/development/libraries/appstream/default.nix b/pkgs/development/libraries/appstream/default.nix
index f59a3fd713f9..429da8de8350 100644
--- a/pkgs/development/libraries/appstream/default.nix
+++ b/pkgs/development/libraries/appstream/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchpatch, fetchFromGitHub, meson, ninja, pkgconfig, gettext
+{ stdenv, fetchFromGitHub, meson, ninja, pkgconfig, gettext
 , xmlto, docbook_xsl, docbook_xml_dtd_45, libxslt
 , libstemmer, glib, xapian, libxml2, libyaml, gobject-introspection
 , pcre, itstool, gperf, vala
diff --git a/pkgs/development/libraries/arb/default.nix b/pkgs/development/libraries/arb/default.nix
index 4c34e40586f3..eb58003a5f63 100644
--- a/pkgs/development/libraries/arb/default.nix
+++ b/pkgs/development/libraries/arb/default.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchFromGitHub, fetchpatch, mpir, gmp, mpfr, flint}:
+{stdenv, fetchFromGitHub, mpir, gmp, mpfr, flint}:
 stdenv.mkDerivation rec {
   name = "${pname}-${version}";
   pname = "arb";
diff --git a/pkgs/development/libraries/aws-c-common/default.nix b/pkgs/development/libraries/aws-c-common/default.nix
index c8f284acc135..380a5071aeee 100644
--- a/pkgs/development/libraries/aws-c-common/default.nix
+++ b/pkgs/development/libraries/aws-c-common/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, cmake, libexecinfo }:
+{ lib, stdenv, fetchFromGitHub, cmake }:
 
 stdenv.mkDerivation rec {
   pname = "aws-c-common";
diff --git a/pkgs/development/libraries/boehm-gc/default.nix b/pkgs/development/libraries/boehm-gc/default.nix
index 2618d35ff794..d6ebaf3c5663 100644
--- a/pkgs/development/libraries/boehm-gc/default.nix
+++ b/pkgs/development/libraries/boehm-gc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, fetchpatch, pkgconfig, libatomic_ops
+{ lib, stdenv, fetchurl, pkgconfig, libatomic_ops
 , enableLargeConfig ? false # doc: https://github.com/ivmai/bdwgc/blob/v7.6.6/doc/README.macros#L179
 }:
 
diff --git a/pkgs/development/libraries/boost/generic.nix b/pkgs/development/libraries/boost/generic.nix
index 90dd8ff1744f..f7bd189022f8 100644
--- a/pkgs/development/libraries/boost/generic.nix
+++ b/pkgs/development/libraries/boost/generic.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, icu, expat, zlib, bzip2, python, fixDarwinDylibNames, libiconv
+{ stdenv, icu, expat, zlib, bzip2, python, fixDarwinDylibNames, libiconv
 , which
 , buildPackages
 , toolset ? /**/ if stdenv.cc.isClang  then "clang"
diff --git a/pkgs/development/libraries/catch2/default.nix b/pkgs/development/libraries/catch2/default.nix
index 67f5350d8fe6..2d0fd4cb1bcf 100644
--- a/pkgs/development/libraries/catch2/default.nix
+++ b/pkgs/development/libraries/catch2/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, cmake, python }:
+{ stdenv, fetchFromGitHub, cmake }:
 
 stdenv.mkDerivation rec {
   name = "catch2-${version}";
diff --git a/pkgs/development/libraries/cyrus-sasl/default.nix b/pkgs/development/libraries/cyrus-sasl/default.nix
index 06eac4423e78..0bdaf1be9551 100644
--- a/pkgs/development/libraries/cyrus-sasl/default.nix
+++ b/pkgs/development/libraries/cyrus-sasl/default.nix
@@ -1,5 +1,5 @@
 { lib, stdenv, fetchurl, openssl, openldap, kerberos, db, gettext
-, pam, fixDarwinDylibNames, autoreconfHook, fetchpatch, enableLdap ? false
+, pam, fixDarwinDylibNames, autoreconfHook, enableLdap ? false
 , buildPackages, pruneLibtoolFiles }:
 
 with stdenv.lib;
diff --git a/pkgs/development/libraries/czmq/4.x.nix b/pkgs/development/libraries/czmq/4.x.nix
index 06801dfb7d24..13cee8fe86ba 100644
--- a/pkgs/development/libraries/czmq/4.x.nix
+++ b/pkgs/development/libraries/czmq/4.x.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, zeromq }:
+{ stdenv, fetchurl, zeromq }:
 
 stdenv.mkDerivation rec {
   version = "4.2.0";
diff --git a/pkgs/development/libraries/dleyna-renderer/default.nix b/pkgs/development/libraries/dleyna-renderer/default.nix
index aae7861fef4f..18244d83dee7 100644
--- a/pkgs/development/libraries/dleyna-renderer/default.nix
+++ b/pkgs/development/libraries/dleyna-renderer/default.nix
@@ -1,5 +1,4 @@
 { stdenv
-, fetchurl
 , fetchFromGitHub
 , autoreconfHook
 , pkgconfig
diff --git a/pkgs/development/libraries/eclib/default.nix b/pkgs/development/libraries/eclib/default.nix
index 681062cd6713..62f04e061cfa 100644
--- a/pkgs/development/libraries/eclib/default.nix
+++ b/pkgs/development/libraries/eclib/default.nix
@@ -1,6 +1,5 @@
 { stdenv
 , fetchFromGitHub
-, fetchpatch
 , autoreconfHook
 , pari
 , ntl
diff --git a/pkgs/development/libraries/editline/default.nix b/pkgs/development/libraries/editline/default.nix
index e2a989f4ef23..6dfd4edd0716 100644
--- a/pkgs/development/libraries/editline/default.nix
+++ b/pkgs/development/libraries/editline/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchpatch, autoreconfHook }:
+{ stdenv, fetchFromGitHub, autoreconfHook }:
 
 stdenv.mkDerivation rec {
   name = "editline-${version}";
diff --git a/pkgs/development/libraries/eigen/default.nix b/pkgs/development/libraries/eigen/default.nix
index 25d0760a32d1..6aec15f976bb 100644
--- a/pkgs/development/libraries/eigen/default.nix
+++ b/pkgs/development/libraries/eigen/default.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchurl, fetchpatch, cmake}:
+{stdenv, fetchurl, cmake}:
 
 let
   version = "3.3.7";
diff --git a/pkgs/development/libraries/exiv2/default.nix b/pkgs/development/libraries/exiv2/default.nix
index 3f731bdf799e..d3095099d3c1 100644
--- a/pkgs/development/libraries/exiv2/default.nix
+++ b/pkgs/development/libraries/exiv2/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchFromGitHub, fetchpatch, zlib, expat, gettext
+{ stdenv, fetchFromGitHub, zlib, expat, gettext
 , autoconf }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/libraries/flatpak/default.nix b/pkgs/development/libraries/flatpak/default.nix
index 4ea17e588a9b..4c4949b37be8 100644
--- a/pkgs/development/libraries/flatpak/default.nix
+++ b/pkgs/development/libraries/flatpak/default.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchurl, autoreconfHook, docbook_xml_dtd_412, docbook_xml_dtd_42, docbook_xml_dtd_43, docbook_xsl, which, libxml2
 , gobject-introspection, gtk-doc, intltool, libxslt, pkgconfig, xmlto, appstream-glib, substituteAll, glibcLocales, yacc, xdg-dbus-proxy, p11-kit
-, bubblewrap, bzip2, dbus, glib, gpgme, json-glib, libarchive, libcap, libseccomp, coreutils, gettext, python2, hicolor-icon-theme
+, bubblewrap, bzip2, dbus, glib, gpgme, json-glib, libarchive, libcap, libseccomp, coreutils, gettext, hicolor-icon-theme
 , libsoup, lzma, ostree, polkit, python3, systemd, xorg, valgrind, glib-networking, wrapGAppsHook, gnome3, gsettings-desktop-schemas, librsvg }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/libraries/fmt/default.nix b/pkgs/development/libraries/fmt/default.nix
index 6974adf74cec..2cfc87d6a2e5 100644
--- a/pkgs/development/libraries/fmt/default.nix
+++ b/pkgs/development/libraries/fmt/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchpatch, cmake, enableShared ? true }:
+{ stdenv, fetchFromGitHub, cmake, enableShared ? true }:
 
 stdenv.mkDerivation rec {
   version = "5.3.0";
diff --git a/pkgs/development/libraries/gdk-pixbuf/default.nix b/pkgs/development/libraries/gdk-pixbuf/default.nix
index d98d9e8107e9..48c232c122b3 100644
--- a/pkgs/development/libraries/gdk-pixbuf/default.nix
+++ b/pkgs/development/libraries/gdk-pixbuf/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, fixDarwinDylibNames, meson, ninja, pkgconfig, gettext, python3, libxml2, libxslt, docbook_xsl
+{ stdenv, fetchurl, fixDarwinDylibNames, meson, ninja, pkgconfig, gettext, python3, libxml2, libxslt, docbook_xsl
 , docbook_xml_dtd_43, gtk-doc, glib, libtiff, libjpeg, libpng, libX11, gnome3
 , jasper, gobject-introspection, doCheck ? false, makeWrapper }:
 
diff --git a/pkgs/development/libraries/gegl/4.0.nix b/pkgs/development/libraries/gegl/4.0.nix
index 4215f0ebc30d..0e3f79b1814c 100644
--- a/pkgs/development/libraries/gegl/4.0.nix
+++ b/pkgs/development/libraries/gegl/4.0.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchurl, pkgconfig, glib, babl, libpng, cairo, libjpeg, which
 , librsvg, pango, gtk, bzip2, json-glib, gettext, autoreconfHook, libraw
-, gexiv2, libwebp, gnome3, libintl }:
+, gexiv2, libwebp, libintl }:
 
 stdenv.mkDerivation rec {
   pname = "gegl";
diff --git a/pkgs/development/libraries/glib/default.nix b/pkgs/development/libraries/glib/default.nix
index a2c7bdc5bde6..4b577d36857a 100644
--- a/pkgs/development/libraries/glib/default.nix
+++ b/pkgs/development/libraries/glib/default.nix
@@ -1,4 +1,4 @@
-{ config, stdenv, fetchurl, fetchpatch, gettext, meson, ninja, pkgconfig, perl, python3, glibcLocales
+{ config, stdenv, fetchurl, gettext, meson, ninja, pkgconfig, perl, python3, glibcLocales
 , libiconv, zlib, libffi, pcre, libelf, gnome3, libselinux, bash, gnum4, gtk-doc, docbook_xsl, docbook_xml_dtd_45
 # use utillinuxMinimal to avoid circular dependency (utillinux, systemd, glib)
 , utillinuxMinimal ? null
diff --git a/pkgs/development/libraries/gmp/5.1.x.nix b/pkgs/development/libraries/gmp/5.1.x.nix
index 43b8434b4961..494d9acb6bb6 100644
--- a/pkgs/development/libraries/gmp/5.1.x.nix
+++ b/pkgs/development/libraries/gmp/5.1.x.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchurl, m4, cxx ? true, withStatic ? true }:
 
-let inherit (stdenv.lib) optional optionalString; in
+let inherit (stdenv.lib) optional; in
 
 let self = stdenv.mkDerivation rec {
   name = "gmp-5.1.3";
diff --git a/pkgs/development/libraries/gmp/6.x.nix b/pkgs/development/libraries/gmp/6.x.nix
index f320c303123e..de31128e5a67 100644
--- a/pkgs/development/libraries/gmp/6.x.nix
+++ b/pkgs/development/libraries/gmp/6.x.nix
@@ -3,7 +3,7 @@
 , buildPackages
 , withStatic ? false }:
 
-let inherit (stdenv.lib) optional optionalString; in
+let inherit (stdenv.lib) optional; in
 
 let self = stdenv.mkDerivation rec {
   name = "gmp-6.1.2";
diff --git a/pkgs/development/libraries/gobject-introspection/default.nix b/pkgs/development/libraries/gobject-introspection/default.nix
index 26c472930ed5..b1fdb916b5ce 100644
--- a/pkgs/development/libraries/gobject-introspection/default.nix
+++ b/pkgs/development/libraries/gobject-introspection/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, glib, flex, bison, meson, ninja, pkgconfig, libffi, python3
-, libintl, cctools, cairo, gnome3, glibcLocales, fetchpatch
+, libintl, cctools, cairo, gnome3, glibcLocales
 , substituteAll, nixStoreDir ? builtins.storeDir
 , x11Support ? true
 }:
diff --git a/pkgs/development/libraries/gsettings-desktop-schemas/default.nix b/pkgs/development/libraries/gsettings-desktop-schemas/default.nix
index c1bdcd6956e7..d454ca63fd7f 100644
--- a/pkgs/development/libraries/gsettings-desktop-schemas/default.nix
+++ b/pkgs/development/libraries/gsettings-desktop-schemas/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, pkgconfig, intltool, glib, gobject-introspection
+{ stdenv, fetchurl, pkgconfig, glib, gobject-introspection
 , meson
 , ninja
 , python3
diff --git a/pkgs/development/libraries/gsignond/default.nix b/pkgs/development/libraries/gsignond/default.nix
index a81e72bf66fb..88a4ecb36225 100644
--- a/pkgs/development/libraries/gsignond/default.nix
+++ b/pkgs/development/libraries/gsignond/default.nix
@@ -61,7 +61,7 @@ unwrapped = stdenv.mkDerivation rec {
 
 in if plugins == [] then unwrapped
     else import ./wrapper.nix {
-      inherit stdenv makeWrapper symlinkJoin gsignondPlugins plugins;
+      inherit makeWrapper symlinkJoin plugins;
       gsignond = unwrapped;
     }
 
diff --git a/pkgs/development/libraries/gsignond/plugins/oauth.nix b/pkgs/development/libraries/gsignond/plugins/oauth.nix
index 6182ea283cba..887376d31874 100644
--- a/pkgs/development/libraries/gsignond/plugins/oauth.nix
+++ b/pkgs/development/libraries/gsignond/plugins/oauth.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitLab, fetchpatch, pkgconfig, meson, ninja, glib, gsignond, check
+{ stdenv, fetchFromGitLab, pkgconfig, meson, ninja, glib, gsignond, check
 , json-glib, libsoup, gnutls, gtk-doc, docbook_xml_dtd_43, docbook_xml_dtd_45
 , docbook_xsl, glibcLocales, gobject-introspection }:
 
diff --git a/pkgs/development/libraries/gsignond/plugins/sasl.nix b/pkgs/development/libraries/gsignond/plugins/sasl.nix
index d1fa37939a78..655f73931f67 100644
--- a/pkgs/development/libraries/gsignond/plugins/sasl.nix
+++ b/pkgs/development/libraries/gsignond/plugins/sasl.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitLab, fetchpatch, pkgconfig, meson, ninja, glib, gsignond, gsasl, check
+{ stdenv, fetchFromGitLab, pkgconfig, meson, ninja, glib, gsignond, gsasl, check
 , gtk-doc, docbook_xml_dtd_43, docbook_xml_dtd_45, docbook_xsl, glibcLocales, gobject-introspection }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/libraries/gsignond/wrapper.nix b/pkgs/development/libraries/gsignond/wrapper.nix
index 04463aac3796..a4738e4b6a73 100644
--- a/pkgs/development/libraries/gsignond/wrapper.nix
+++ b/pkgs/development/libraries/gsignond/wrapper.nix
@@ -1,4 +1,4 @@
-{ stdenv, makeWrapper, symlinkJoin, gsignond, gsignondPlugins, plugins }:
+{ makeWrapper, symlinkJoin, gsignond, plugins }:
 
 symlinkJoin {
   name = "gsignond-with-plugins-${gsignond.version}";
diff --git a/pkgs/development/libraries/ldacbt/default.nix b/pkgs/development/libraries/ldacbt/default.nix
index 4ff58843d155..839f0a75156b 100644
--- a/pkgs/development/libraries/ldacbt/default.nix
+++ b/pkgs/development/libraries/ldacbt/default.nix
@@ -1,6 +1,5 @@
 { stdenv
 , fetchFromGitHub
-, pkgconfig
 , cmake
 }:
 
diff --git a/pkgs/development/libraries/leptonica/default.nix b/pkgs/development/libraries/leptonica/default.nix
index 52d835d7a206..dd3c42e8b7f5 100644
--- a/pkgs/development/libraries/leptonica/default.nix
+++ b/pkgs/development/libraries/leptonica/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, autoreconfHook, pkgconfig, which, gnuplot
+{ stdenv, fetchurl, autoreconfHook, pkgconfig, which, gnuplot
 , giflib, libjpeg, libpng, libtiff, libwebp, openjpeg, zlib
 }:
 
diff --git a/pkgs/development/libraries/libao/default.nix b/pkgs/development/libraries/libao/default.nix
index c1cf3215c16c..826f72b1f5fb 100644
--- a/pkgs/development/libraries/libao/default.nix
+++ b/pkgs/development/libraries/libao/default.nix
@@ -1,5 +1,5 @@
 { stdenv, lib, fetchFromGitHub, autoreconfHook, pkgconfig, libpulseaudio, alsaLib, libcap
-, CoreAudio, CoreServices, AudioUnit, AudioToolbox
+, CoreAudio, CoreServices, AudioUnit
 , usePulseAudio }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/libraries/libaom/default.nix b/pkgs/development/libraries/libaom/default.nix
index c7d7bfb1e824..62e0a850bad3 100644
--- a/pkgs/development/libraries/libaom/default.nix
+++ b/pkgs/development/libraries/libaom/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchgit, yasm, perl, cmake, pkgconfig, python3, writeText }:
+{ stdenv, fetchgit, yasm, perl, cmake, pkgconfig, python3 }:
 
 stdenv.mkDerivation rec {
   name = "libaom-${version}";
diff --git a/pkgs/development/libraries/libaosd/default.nix b/pkgs/development/libraries/libaosd/default.nix
index e63bfd20c797..dd3320005a41 100644
--- a/pkgs/development/libraries/libaosd/default.nix
+++ b/pkgs/development/libraries/libaosd/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, pkgconfig, cairo, pango,
+{ stdenv, fetchFromGitHub, pkgconfig, cairo, pango,
   libX11, libXcomposite, autoconf, automake }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/libraries/libbladeRF/default.nix b/pkgs/development/libraries/libbladeRF/default.nix
index d908a8af85da..d22518e96d42 100644
--- a/pkgs/development/libraries/libbladeRF/default.nix
+++ b/pkgs/development/libraries/libbladeRF/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, fetchpatch, pkgconfig, cmake, git, doxygen, help2man, ncurses, tecla
+{ stdenv, lib, fetchFromGitHub, pkgconfig, cmake, git, doxygen, help2man, ncurses, tecla
 , libusb1, udev }:
 
 let
diff --git a/pkgs/development/libraries/libcsptr/default.nix b/pkgs/development/libraries/libcsptr/default.nix
index d7638dd20597..3d32f4d0b953 100644
--- a/pkgs/development/libraries/libcsptr/default.nix
+++ b/pkgs/development/libraries/libcsptr/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, cmake, git }:
+{ stdenv, fetchFromGitHub, cmake }:
 
 stdenv.mkDerivation rec {
   name = "libcsptr-${version}";
diff --git a/pkgs/development/libraries/libevent/default.nix b/pkgs/development/libraries/libevent/default.nix
index 2bc2bcb5b856..611287b9aaa8 100644
--- a/pkgs/development/libraries/libevent/default.nix
+++ b/pkgs/development/libraries/libevent/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, findutils, fixDarwinDylibNames
+{ stdenv, fetchurl, findutils, fixDarwinDylibNames
 , sslSupport? true, openssl
 }:
 
diff --git a/pkgs/development/libraries/libfaketime/default.nix b/pkgs/development/libraries/libfaketime/default.nix
index 65d04cb53f16..f553afdfc709 100644
--- a/pkgs/development/libraries/libfaketime/default.nix
+++ b/pkgs/development/libraries/libfaketime/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, bash, perl }:
+{ stdenv, fetchurl, perl }:
 
 stdenv.mkDerivation rec {
   name = "libfaketime-${version}";
diff --git a/pkgs/development/libraries/libgdamm/default.nix b/pkgs/development/libraries/libgdamm/default.nix
index 4367cc5b2764..f5cc5efa06a1 100644
--- a/pkgs/development/libraries/libgdamm/default.nix
+++ b/pkgs/development/libraries/libgdamm/default.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchurl, pkgconfig, glibmm, libgda, libxml2, gnome3
-, mysqlSupport ? false, mysql ? null
-, postgresSupport ? false, postgresql ? null }:
+, mysqlSupport ? false
+, postgresSupport ? false }:
 
 let
   gda = libgda.override {
diff --git a/pkgs/development/libraries/libgpg-error/default.nix b/pkgs/development/libraries/libgpg-error/default.nix
index dc221156f461..f3e1b8b0f997 100644
--- a/pkgs/development/libraries/libgpg-error/default.nix
+++ b/pkgs/development/libraries/libgpg-error/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchpatch, buildPackages, fetchurl, gettext
+{ stdenv, lib, buildPackages, fetchurl, gettext
 , genPosixLockObjOnly ? false
 }: let
   genPosixLockObjOnlyAttrs = lib.optionalAttrs genPosixLockObjOnly {
diff --git a/pkgs/development/libraries/libhttpseverywhere/default.nix b/pkgs/development/libraries/libhttpseverywhere/default.nix
index cf5c80c9b219..c58812eca58b 100644
--- a/pkgs/development/libraries/libhttpseverywhere/default.nix
+++ b/pkgs/development/libraries/libhttpseverywhere/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, pkgconfig, meson, ninja, makeFontsConf, vala, fetchpatch
-, gnome3, glib, json-glib, libarchive, libsoup, gobject-introspection, valadoc }:
+, gnome3, glib, json-glib, libarchive, libsoup, gobject-introspection }:
 
 let
   pname = "libhttpseverywhere";
diff --git a/pkgs/development/libraries/libical/default.nix b/pkgs/development/libraries/libical/default.nix
index 916530220526..b86a48ecd1ba 100644
--- a/pkgs/development/libraries/libical/default.nix
+++ b/pkgs/development/libraries/libical/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchFromGitHub, perl, pkgconfig, cmake, ninja, vala, gobject-introspection
-, python3, tzdata, gtk-doc, docbook_xsl, docbook_xml_dtd_43, glib, libxml2, icu }:
+, python3, tzdata, glib, libxml2, icu }:
 
 stdenv.mkDerivation rec {
   name = "libical-${version}";
diff --git a/pkgs/development/libraries/libjpeg-turbo/default.nix b/pkgs/development/libraries/libjpeg-turbo/default.nix
index 57c35ab86777..371d7b838d40 100644
--- a/pkgs/development/libraries/libjpeg-turbo/default.nix
+++ b/pkgs/development/libraries/libjpeg-turbo/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, cmake, nasm }:
+{ stdenv, fetchurl, cmake, nasm }:
 
 stdenv.mkDerivation rec {
 
diff --git a/pkgs/development/libraries/libmikmod/default.nix b/pkgs/development/libraries/libmikmod/default.nix
index ef095fd4336a..284d415454de 100644
--- a/pkgs/development/libraries/libmikmod/default.nix
+++ b/pkgs/development/libraries/libmikmod/default.nix
@@ -1,7 +1,7 @@
 { stdenv, fetchurl, texinfo, alsaLib, libpulseaudio, CoreAudio }:
 
 let
-  inherit (stdenv.lib) optional optionals optionalString;
+  inherit (stdenv.lib) optional optionalString;
 
 in stdenv.mkDerivation rec {
   name = "libmikmod-3.3.11.1";
diff --git a/pkgs/development/libraries/libndctl/default.nix b/pkgs/development/libraries/libndctl/default.nix
index d9db09f1e98e..222a0df055bb 100644
--- a/pkgs/development/libraries/libndctl/default.nix
+++ b/pkgs/development/libraries/libndctl/default.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchFromGitHub, autoreconfHook
 , asciidoctor, pkgconfig, xmlto, docbook_xsl, docbook_xml_dtd_45, libxslt
-, json_c, kmod, which, file, utillinux, systemd, keyutils
+, json_c, kmod, which, utillinux, systemd, keyutils
 }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/libraries/libosinfo/default.nix b/pkgs/development/libraries/libosinfo/default.nix
index 9efeb0f678e0..04f0db030bb0 100644
--- a/pkgs/development/libraries/libosinfo/default.nix
+++ b/pkgs/development/libraries/libosinfo/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, pkgconfig, intltool, gobject-introspection, gtk-doc, docbook_xsl
+{ stdenv, fetchurl, pkgconfig, intltool, gobject-introspection, gtk-doc, docbook_xsl
 , glib, libsoup, libxml2, libxslt, check, curl, perl, hwdata, osinfo-db, vala ? null
 }:
 
diff --git a/pkgs/development/libraries/libssh/default.nix b/pkgs/development/libraries/libssh/default.nix
index fe7bc094fdce..65de6db3b47b 100644
--- a/pkgs/development/libraries/libssh/default.nix
+++ b/pkgs/development/libraries/libssh/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, pkgconfig, cmake, zlib, openssl, libsodium }:
+{ stdenv, fetchurl, pkgconfig, cmake, zlib, openssl, libsodium }:
 
 stdenv.mkDerivation rec {
   name = "libssh-0.8.7";
diff --git a/pkgs/development/libraries/libtorrent-rasterbar/default.nix b/pkgs/development/libraries/libtorrent-rasterbar/default.nix
index cd8192e34fb9..046229e8f1d7 100644
--- a/pkgs/development/libraries/libtorrent-rasterbar/default.nix
+++ b/pkgs/development/libraries/libtorrent-rasterbar/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, fetchpatch, pkgconfig, automake, autoconf
+{ stdenv, lib, fetchFromGitHub, pkgconfig, automake, autoconf
 , zlib, boost, openssl, libtool, python, libiconv, geoip, ncurses
 }:
 
diff --git a/pkgs/development/libraries/libuv/default.nix b/pkgs/development/libraries/libuv/default.nix
index e725439a3f1a..f5026da4c3b9 100644
--- a/pkgs/development/libraries/libuv/default.nix
+++ b/pkgs/development/libraries/libuv/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchpatch, fetchFromGitHub, autoconf, automake, libtool, pkgconfig, ApplicationServices, CoreServices }:
+{ stdenv, lib, fetchFromGitHub, autoconf, automake, libtool, pkgconfig, ApplicationServices, CoreServices }:
 
 stdenv.mkDerivation rec {
   version = "1.29.1";
diff --git a/pkgs/development/libraries/libxml2/default.nix b/pkgs/development/libraries/libxml2/default.nix
index de131052314a..33f818f7d62c 100644
--- a/pkgs/development/libraries/libxml2/default.nix
+++ b/pkgs/development/libraries/libxml2/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, fetchpatch
+{ stdenv, lib, fetchurl
 , zlib, xz, python2, ncurses, findXMLCatalogs
 , pythonSupport ? stdenv.buildPlatform == stdenv.hostPlatform
 , icuSupport ? false, icu ? null
diff --git a/pkgs/development/libraries/linbox/default.nix b/pkgs/development/libraries/linbox/default.nix
index 11f975187b0b..500015f61c63 100644
--- a/pkgs/development/libraries/linbox/default.nix
+++ b/pkgs/development/libraries/linbox/default.nix
@@ -1,6 +1,5 @@
 { stdenv
 , fetchFromGitHub
-, fetchpatch
 , autoreconfHook
 , givaro
 , pkgconfig
diff --git a/pkgs/development/libraries/mapnik/default.nix b/pkgs/development/libraries/mapnik/default.nix
index 1424ef9e12b4..3a90a4cdf33e 100644
--- a/pkgs/development/libraries/mapnik/default.nix
+++ b/pkgs/development/libraries/mapnik/default.nix
@@ -1,6 +1,6 @@
-{ stdenv, fetchzip, fetchpatch
+{ stdenv, fetchzip
 , boost, cairo, freetype, gdal, harfbuzz, icu, libjpeg, libpng, libtiff
-, libwebp, libxml2, proj, python, scons, sqlite, zlib
+, libwebp, libxml2, proj, python, sqlite, zlib
 
 # supply a postgresql package to enable the PostGIS input plugin
 , postgresql ? null
diff --git a/pkgs/development/libraries/mtxclient/default.nix b/pkgs/development/libraries/mtxclient/default.nix
index 3ab1e0a79749..ca0e73078a16 100644
--- a/pkgs/development/libraries/mtxclient/default.nix
+++ b/pkgs/development/libraries/mtxclient/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchFromGitHub, fetchpatch, cmake, pkgconfig
-, boost, openssl, zlib, libsodium, olm, gtest, spdlog, nlohmann_json }:
+, boost, openssl, zlib, libsodium, olm, nlohmann_json }:
 
 stdenv.mkDerivation rec {
   name = "mtxclient-${version}";
diff --git a/pkgs/development/libraries/nsss/default.nix b/pkgs/development/libraries/nsss/default.nix
index f503799e6b1c..cd1205e2c7d4 100644
--- a/pkgs/development/libraries/nsss/default.nix
+++ b/pkgs/development/libraries/nsss/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, skawarePackages }:
+{ skawarePackages }:
 
 with skawarePackages;
 
diff --git a/pkgs/development/libraries/opencv/3.x.nix b/pkgs/development/libraries/opencv/3.x.nix
index b0652176c940..5e78f9f92ecf 100644
--- a/pkgs/development/libraries/opencv/3.x.nix
+++ b/pkgs/development/libraries/opencv/3.x.nix
@@ -1,5 +1,5 @@
 { lib, stdenv
-, fetchurl, fetchFromGitHub, fetchpatch
+, fetchFromGitHub, fetchpatch
 , cmake, pkgconfig, unzip, zlib, pcre, hdf5
 , glog, boost, google-gflags, protobuf
 , config
diff --git a/pkgs/development/libraries/openmpi/default.nix b/pkgs/development/libraries/openmpi/default.nix
index 1a0e589373ca..61d42e4452fc 100644
--- a/pkgs/development/libraries/openmpi/default.nix
+++ b/pkgs/development/libraries/openmpi/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, gfortran, perl, libnl
+{ stdenv, fetchurl, gfortran, perl, libnl
 , rdma-core, zlib, numactl, libevent, hwloc
 
 # Enable the Sun Grid Engine bindings
diff --git a/pkgs/development/libraries/openssl/default.nix b/pkgs/development/libraries/openssl/default.nix
index ef617a92eaa7..67b903970d3e 100644
--- a/pkgs/development/libraries/openssl/default.nix
+++ b/pkgs/development/libraries/openssl/default.nix
@@ -7,7 +7,7 @@
 with stdenv.lib;
 
 let
-  common = args@{ version, sha256, patches ? [], withDocs ? false }: stdenv.mkDerivation rec {
+  common = { version, sha256, patches ? [], withDocs ? false }: stdenv.mkDerivation rec {
     name = "openssl-${version}";
 
     src = fetchurl {
diff --git a/pkgs/development/libraries/pagmo2/default.nix b/pkgs/development/libraries/pagmo2/default.nix
index 842fae5ea938..47c6a27639d4 100644
--- a/pkgs/development/libraries/pagmo2/default.nix
+++ b/pkgs/development/libraries/pagmo2/default.nix
@@ -1,12 +1,10 @@
-{ lib
-, fetchFromGitHub
+{ fetchFromGitHub
 , stdenv
 , cmake
 , eigen
 , nlopt
 , ipopt
 , boost
-, writeText
 }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/libraries/pcl/default.nix b/pkgs/development/libraries/pcl/default.nix
index 08a1613c2feb..fd2b9feff68b 100644
--- a/pkgs/development/libraries/pcl/default.nix
+++ b/pkgs/development/libraries/pcl/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchpatch, cmake
+{ stdenv, fetchFromGitHub, cmake
 , qhull, flann, boost, vtk, eigen, pkgconfig, qtbase
 , libusb1, libpcap, libXt, libpng, Cocoa, AGL, cf-private, OpenGL
 }:
diff --git a/pkgs/development/libraries/physics/geant4/g4py/default.nix b/pkgs/development/libraries/physics/geant4/g4py/default.nix
index f28f0fd64203..0b1f3f0490d2 100644
--- a/pkgs/development/libraries/physics/geant4/g4py/default.nix
+++ b/pkgs/development/libraries/physics/geant4/g4py/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, cmake, xercesc
+{ stdenv, cmake, xercesc
 
 # The target version of Geant4
 , geant4
diff --git a/pkgs/development/libraries/pixman/default.nix b/pkgs/development/libraries/pixman/default.nix
index 2a033304b66e..d3bbb8679746 100644
--- a/pkgs/development/libraries/pixman/default.nix
+++ b/pkgs/development/libraries/pixman/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, pkgconfig, libpng, glib /*just passthru*/ }:
+{ stdenv, fetchurl, pkgconfig, libpng, glib /*just passthru*/ }:
 
 stdenv.mkDerivation rec {
   name = "pixman-${version}";
diff --git a/pkgs/development/libraries/podofo/default.nix b/pkgs/development/libraries/podofo/default.nix
index ce3f5ab6b789..722c1cae8721 100644
--- a/pkgs/development/libraries/podofo/default.nix
+++ b/pkgs/development/libraries/podofo/default.nix
@@ -1,6 +1,5 @@
 { stdenv, fetchurl, cmake, zlib, freetype, libjpeg, libtiff, fontconfig
 , openssl, libpng, lua5, pkgconfig, libidn, expat, fetchpatch
-, gcc5 # TODO(@Dridus) remove this at next hash break
 }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/libraries/polkit/default.nix b/pkgs/development/libraries/polkit/default.nix
index fb16a7fb6939..b5b9f1f7fa4d 100644
--- a/pkgs/development/libraries/polkit/default.nix
+++ b/pkgs/development/libraries/polkit/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, autoreconfHook, pkgconfig, glib, expat, pam, perl
+{ stdenv, fetchurl, pkgconfig, glib, expat, pam, perl
 , intltool, spidermonkey_60 , gobject-introspection, libxslt, docbook_xsl, dbus
 , docbook_xml_dtd_412, gtk-doc, coreutils
 , useSystemd ? stdenv.isLinux, systemd
diff --git a/pkgs/development/libraries/properties-cpp/default.nix b/pkgs/development/libraries/properties-cpp/default.nix
index 06444e776703..bd20dc540c06 100644
--- a/pkgs/development/libraries/properties-cpp/default.nix
+++ b/pkgs/development/libraries/properties-cpp/default.nix
@@ -1,5 +1,5 @@
-{ stdenv, lib, fetchurl, cmake, pkgconfig, gtest, doxygen
-, graphviz, lcov, writeText }:
+{ stdenv, fetchurl, cmake, pkgconfig, gtest, doxygen
+, graphviz, lcov }:
 
 stdenv.mkDerivation rec {
   pname = "properties-cpp";
diff --git a/pkgs/development/libraries/protobuf/generic-v3.nix b/pkgs/development/libraries/protobuf/generic-v3.nix
index 883dff56f2ee..610efcfef298 100644
--- a/pkgs/development/libraries/protobuf/generic-v3.nix
+++ b/pkgs/development/libraries/protobuf/generic-v3.nix
@@ -1,6 +1,6 @@
 { stdenv
 , fetchFromGitHub
-, autoreconfHook, zlib, gmock, which, buildPackages
+, autoreconfHook, zlib, gmock, buildPackages
 , version, sha256
 , ...
 }:
diff --git a/pkgs/development/libraries/qpdf/default.nix b/pkgs/development/libraries/qpdf/default.nix
index dceda3c04bd4..5bccbf74965a 100644
--- a/pkgs/development/libraries/qpdf/default.nix
+++ b/pkgs/development/libraries/qpdf/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, libjpeg, zlib, perl }:
+{ stdenv, fetchurl, libjpeg, zlib, perl }:
 
 let version = "8.4.2";
 in
diff --git a/pkgs/development/libraries/qt-5/modules/qtwebkit.nix b/pkgs/development/libraries/qt-5/modules/qtwebkit.nix
index 2a474ab0ffea..40f4c56e8091 100644
--- a/pkgs/development/libraries/qt-5/modules/qtwebkit.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtwebkit.nix
@@ -1,6 +1,6 @@
 { qtModule, stdenv, lib, fetchurl
 , qtbase, qtdeclarative, qtlocation, qtmultimedia, qtsensors, qtwebchannel
-, fontconfig, gdk_pixbuf, gtk2, libwebp, libxml2, libxslt
+, fontconfig, gtk2, libwebp, libxml2, libxslt
 , sqlite, systemd, glib, gst_all_1, cmake
 , bison2, flex, gdb, gperf, perl, pkgconfig, python2, ruby
 , darwin
diff --git a/pkgs/development/libraries/science/biology/mirtk/default.nix b/pkgs/development/libraries/science/biology/mirtk/default.nix
index 51beba898f6c..22bcc56c82ab 100644
--- a/pkgs/development/libraries/science/biology/mirtk/default.nix
+++ b/pkgs/development/libraries/science/biology/mirtk/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, gtest, fetchFromGitHub, cmake, boost, eigen, python, vtk, zlib }:
+{ stdenv, gtest, fetchFromGitHub, cmake, boost, eigen, python, vtk, zlib }:
 
 stdenv.mkDerivation rec {
   version = "2.0.0";
diff --git a/pkgs/development/libraries/science/math/liblapack/default.nix b/pkgs/development/libraries/science/math/liblapack/default.nix
index c26e9c575ab2..46538d0022e7 100644
--- a/pkgs/development/libraries/science/math/liblapack/default.nix
+++ b/pkgs/development/libraries/science/math/liblapack/default.nix
@@ -7,8 +7,7 @@
   shared ? false
 }:
 let
-  usedLibExtension = if shared then ".so" else ".a";
-  inherit (stdenv.lib) optional optionals;
+  inherit (stdenv.lib) optional;
   version = "3.8.0";
 in
 
diff --git a/pkgs/development/libraries/science/math/mkl/default.nix b/pkgs/development/libraries/science/math/mkl/default.nix
index 350cfb1f7a24..2dcac58bf6ca 100644
--- a/pkgs/development/libraries/science/math/mkl/default.nix
+++ b/pkgs/development/libraries/science/math/mkl/default.nix
@@ -1,4 +1,4 @@
-{ stdenvNoCC, writeText, fetchurl, rpmextract, undmg, darwin }:
+{ stdenvNoCC, fetchurl, rpmextract, undmg, darwin }:
 /*
   For details on using mkl as a blas provider for python packages such as numpy,
   numexpr, scipy, etc., see the Python section of the NixPkgs manual.
diff --git a/pkgs/development/libraries/science/math/openblas/default.nix b/pkgs/development/libraries/science/math/openblas/default.nix
index 8ec00f7e2b8b..d967bbf8c3e1 100644
--- a/pkgs/development/libraries/science/math/openblas/default.nix
+++ b/pkgs/development/libraries/science/math/openblas/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchpatch, gfortran, perl, which, config
+{ stdenv, fetchFromGitHub, perl, which
 # Most packages depending on openblas expect integer width to match
 # pointer width, but some expect to use 32-bit integers always
 # (for compatibility with reference BLAS).
diff --git a/pkgs/development/libraries/skalibs/default.nix b/pkgs/development/libraries/skalibs/default.nix
index e56d677e8a46..49c89e68ad22 100644
--- a/pkgs/development/libraries/skalibs/default.nix
+++ b/pkgs/development/libraries/skalibs/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, skawarePackages }:
+{ skawarePackages }:
 
 with skawarePackages;
 
diff --git a/pkgs/development/libraries/spice-gtk/default.nix b/pkgs/development/libraries/spice-gtk/default.nix
index 0169a42ed65e..d597fd16ad07 100644
--- a/pkgs/development/libraries/spice-gtk/default.nix
+++ b/pkgs/development/libraries/spice-gtk/default.nix
@@ -1,14 +1,12 @@
 { stdenv
 , fetchurl
 , pkgconfig
-, fetchpatch
 , meson
 , ninja
 , python3
 , spice-protocol
 , gettext
 , openssl
-, libpulseaudio
 , pixman
 , gobject-introspection
 , libjpeg_turbo
diff --git a/pkgs/development/libraries/spice/default.nix b/pkgs/development/libraries/spice/default.nix
index 902bc6a5560f..9e50a3b86b94 100644
--- a/pkgs/development/libraries/spice/default.nix
+++ b/pkgs/development/libraries/spice/default.nix
@@ -1,5 +1,4 @@
 { stdenv
-, substituteAll
 , fetchurl
 , meson
 , ninja
diff --git a/pkgs/development/libraries/tk/generic.nix b/pkgs/development/libraries/tk/generic.nix
index 6e4640fabb7b..be09bb73b3aa 100644
--- a/pkgs/development/libraries/tk/generic.nix
+++ b/pkgs/development/libraries/tk/generic.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, src, pkgconfig, tcl, libXft, fontconfig, patches ? []
+{ stdenv, lib, src, pkgconfig, tcl, libXft, patches ? []
 , enableAqua ? stdenv.isDarwin, darwin
 , ... }:
 
diff --git a/pkgs/development/libraries/umockdev/default.nix b/pkgs/development/libraries/umockdev/default.nix
index b6f1136ea2b9..07892e970875 100644
--- a/pkgs/development/libraries/umockdev/default.nix
+++ b/pkgs/development/libraries/umockdev/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, autoreconfHook, umockdev, gobject-introspection
+{ stdenv, fetchFromGitHub, autoreconfHook, gobject-introspection
 , pkgconfig, glib, systemd, libgudev, vala }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/libraries/utmps/default.nix b/pkgs/development/libraries/utmps/default.nix
index 81562659c0d9..16d4a8fa40b5 100644
--- a/pkgs/development/libraries/utmps/default.nix
+++ b/pkgs/development/libraries/utmps/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, skawarePackages }:
+{ skawarePackages }:
 
 with skawarePackages;
 
diff --git a/pkgs/development/libraries/volume-key/default.nix b/pkgs/development/libraries/volume-key/default.nix
index 32f816023e5a..f6669f2f8fea 100644
--- a/pkgs/development/libraries/volume-key/default.nix
+++ b/pkgs/development/libraries/volume-key/default.nix
@@ -1,7 +1,6 @@
 { stdenv, fetchgit, autoreconfHook, pkgconfig, gettext, python3
 , ncurses, swig, glib, utillinux, cryptsetup, nss, gpgme
 , autoconf, automake, libtool
-, writeShellScriptBin
 , buildPackages
 }:
 
diff --git a/pkgs/development/libraries/vte/2.90.nix b/pkgs/development/libraries/vte/2.90.nix
index 4b2b74c5e1d5..f4e8c128ccbf 100644
--- a/pkgs/development/libraries/vte/2.90.nix
+++ b/pkgs/development/libraries/vte/2.90.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, intltool, pkgconfig, gnome3, glib, gtk3, ncurses, gobject-introspection }:
+{ stdenv, fetchurl, intltool, pkgconfig, glib, gtk3, ncurses, gobject-introspection }:
 
 stdenv.mkDerivation rec {
   versionMajor = "0.36";
diff --git a/pkgs/development/libraries/wlroots/default.nix b/pkgs/development/libraries/wlroots/default.nix
index 47e1c37492c1..5567b6595ea5 100644
--- a/pkgs/development/libraries/wlroots/default.nix
+++ b/pkgs/development/libraries/wlroots/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchpatch, meson, ninja, pkgconfig
+{ stdenv, fetchFromGitHub, meson, ninja, pkgconfig
 , wayland, libGL, wayland-protocols, libinput, libxkbcommon, pixman
 , xcbutilwm, libX11, libcap, xcbutilimage, xcbutilerrors, mesa_noglu
 , libpng, ffmpeg_4
diff --git a/pkgs/development/libraries/wxwidgets/3.0/default.nix b/pkgs/development/libraries/wxwidgets/3.0/default.nix
index a89f132b8322..4d95b43ff876 100644
--- a/pkgs/development/libraries/wxwidgets/3.0/default.nix
+++ b/pkgs/development/libraries/wxwidgets/3.0/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchurl, fetchpatch, pkgconfig
+{ stdenv, fetchFromGitHub, fetchurl, pkgconfig
 , gtk2, gtk3, libXinerama, libSM, libXxf86vm
 , xorgproto, gstreamer, gst-plugins-base, GConf, setfile
 , libGLSupported
diff --git a/pkgs/development/libraries/wxwidgets/3.0/mac.nix b/pkgs/development/libraries/wxwidgets/3.0/mac.nix
index 6e559cfb6a94..7a32aba24ff8 100644
--- a/pkgs/development/libraries/wxwidgets/3.0/mac.nix
+++ b/pkgs/development/libraries/wxwidgets/3.0/mac.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchzip, fetchpatch, expat, libiconv, libjpeg, libpng, libtiff, zlib
+{ stdenv, fetchzip, expat, libiconv, libjpeg, libpng, libtiff, zlib
 # darwin only attributes
 , cf-private, derez, rez, setfile
 , AGL, Cocoa, Kernel
diff --git a/pkgs/development/libraries/xdg-desktop-portal-gtk/default.nix b/pkgs/development/libraries/xdg-desktop-portal-gtk/default.nix
index 780b7d630cb7..b8cf86999e0b 100644
--- a/pkgs/development/libraries/xdg-desktop-portal-gtk/default.nix
+++ b/pkgs/development/libraries/xdg-desktop-portal-gtk/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, autoreconfHook, pkgconfig, libxml2, xdg-desktop-portal, gtk3, glib, wrapGAppsHook, gnome3, gsettings-desktop-schemas }:
+{ stdenv, fetchFromGitHub, autoreconfHook, pkgconfig, libxml2, xdg-desktop-portal, gtk3, glib, wrapGAppsHook, gsettings-desktop-schemas }:
 
 stdenv.mkDerivation rec {
   pname = "xdg-desktop-portal-gtk";
diff --git a/pkgs/development/lua-modules/default.nix b/pkgs/development/lua-modules/default.nix
index 372d609792c2..091b94f58f51 100644
--- a/pkgs/development/lua-modules/default.nix
+++ b/pkgs/development/lua-modules/default.nix
@@ -1,5 +1,5 @@
 # inspired by pkgs/development/haskell-modules/default.nix
-{ pkgs, stdenv, lib
+{ pkgs, lib
 , lua
 , overrides ? (self: super: {})
 }:
diff --git a/pkgs/development/lua-modules/overrides.nix b/pkgs/development/lua-modules/overrides.nix
index e00a5b904c50..0f448343e968 100644
--- a/pkgs/development/lua-modules/overrides.nix
+++ b/pkgs/development/lua-modules/overrides.nix
@@ -1,4 +1,4 @@
-{ pkgs,  ... }@args:
+{ pkgs,  ... }:
 self: super:
 with super;
 {
diff --git a/pkgs/development/mobile/androidenv/compose-android-packages.nix b/pkgs/development/mobile/androidenv/compose-android-packages.nix
index 40b2ed775cd5..e5802c12e816 100644
--- a/pkgs/development/mobile/androidenv/compose-android-packages.nix
+++ b/pkgs/development/mobile/androidenv/compose-android-packages.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchurl, requireFile, makeWrapper, unzip, autoPatchelfHook, pkgs, pkgs_i686, licenseAccepted ? false}:
+{requireFile, autoPatchelfHook, pkgs, pkgs_i686, licenseAccepted ? false}:
 
 { toolsVersion ? "25.2.5"
 , platformToolsVersion ? "28.0.1"
diff --git a/pkgs/development/mobile/androidenv/default.nix b/pkgs/development/mobile/androidenv/default.nix
index 8d57f737c340..b05167460717 100644
--- a/pkgs/development/mobile/androidenv/default.nix
+++ b/pkgs/development/mobile/androidenv/default.nix
@@ -5,7 +5,7 @@
 
 rec {
   composeAndroidPackages = import ./compose-android-packages.nix {
-    inherit (pkgs) stdenv fetchurl requireFile makeWrapper unzip autoPatchelfHook;
+    inherit (pkgs) requireFile autoPatchelfHook;
     inherit pkgs pkgs_i686 licenseAccepted;
   };
 
diff --git a/pkgs/development/mobile/androidenv/emulate-app.nix b/pkgs/development/mobile/androidenv/emulate-app.nix
index 01669024b3b8..6c8f6d664d75 100644
--- a/pkgs/development/mobile/androidenv/emulate-app.nix
+++ b/pkgs/development/mobile/androidenv/emulate-app.nix
@@ -8,7 +8,6 @@
 
 let
   androidSdkArgNames = builtins.attrNames (builtins.functionArgs composeAndroidPackages);
-  extraParams = removeAttrs args ([ "name" ] ++ androidSdkArgNames);
 
   # Extract the parameters meant for the Android SDK
   androidParams = {
diff --git a/pkgs/development/mobile/titaniumenv/build-app.nix b/pkgs/development/mobile/titaniumenv/build-app.nix
index 9e19afb24429..a7e158bd3bb1 100644
--- a/pkgs/development/mobile/titaniumenv/build-app.nix
+++ b/pkgs/development/mobile/titaniumenv/build-app.nix
@@ -20,10 +20,6 @@ let
 
   androidsdk = (composeAndroidPackages realAndroidsdkArgs).androidsdk;
 
-  realXcodewrapperArgs = {
-    inherit xcodeBaseDir;
-  } // xcodewrapperArgs;
-
   xcodewrapper = composeXcodeWrapper xcodewrapperArgs;
 
   deleteKeychain = ''
diff --git a/pkgs/development/mobile/titaniumenv/default.nix b/pkgs/development/mobile/titaniumenv/default.nix
index 336194cf0a81..e29801c51f97 100644
--- a/pkgs/development/mobile/titaniumenv/default.nix
+++ b/pkgs/development/mobile/titaniumenv/default.nix
@@ -1,4 +1,4 @@
-{pkgs, pkgs_i686, androidenv, xcodeenv, tiVersion ? "7.1.0.GA"}:
+{pkgs, androidenv, xcodeenv, tiVersion ? "7.1.0.GA"}:
 
 rec {
   titaniumsdk = let
diff --git a/pkgs/development/ocaml-modules/bap/default.nix b/pkgs/development/ocaml-modules/bap/default.nix
index 64bbd91a3d56..30e3687676ab 100644
--- a/pkgs/development/ocaml-modules/bap/default.nix
+++ b/pkgs/development/ocaml-modules/bap/default.nix
@@ -1,6 +1,6 @@
-{ stdenv, fetchFromGitHub, fetchurl, fetchpatch
+{ stdenv, fetchFromGitHub, fetchurl
 , ocaml, findlib, ocamlbuild, ocaml_oasis,
- bitstring, camlzip, cmdliner, core_kernel, ezjsonm, faillib, fileutils, ocaml_lwt, ocamlgraph, ocurl, re, uri, zarith, piqi, piqi-ocaml, uuidm, llvm_38, frontc, ounit, ppx_jane, parsexp,
+ bitstring, camlzip, cmdliner, core_kernel, ezjsonm, fileutils, ocaml_lwt, ocamlgraph, ocurl, re, uri, zarith, piqi, piqi-ocaml, uuidm, llvm_38, frontc, ounit, ppx_jane, parsexp,
  utop,
  ppx_tools_versioned,
  which, makeWrapper, writeText
diff --git a/pkgs/development/ocaml-modules/cohttp/default.nix b/pkgs/development/ocaml-modules/cohttp/default.nix
index 23585ad009c5..3d293b1a1ac4 100644
--- a/pkgs/development/ocaml-modules/cohttp/default.nix
+++ b/pkgs/development/ocaml-modules/cohttp/default.nix
@@ -1,5 +1,5 @@
 { lib, fetchFromGitHub, buildDunePackage
-, ppx_fields_conv, ppx_sexp_conv, ppx_deriving
+, ppx_fields_conv, ppx_sexp_conv
 , base64, fieldslib, jsonm, re, stringext, uri
 }:
 
diff --git a/pkgs/development/ocaml-modules/eliom/default.nix b/pkgs/development/ocaml-modules/eliom/default.nix
index d35a57f6b4bc..010df7d8df92 100644
--- a/pkgs/development/ocaml-modules/eliom/default.nix
+++ b/pkgs/development/ocaml-modules/eliom/default.nix
@@ -1,6 +1,5 @@
 { stdenv, fetchzip, which, ocsigen_server, ocsigen_deriving, ocaml, lwt_camlp4,
-  lwt_react, cryptokit,
-  ipaddr, ocamlnet, ocaml_pcre,
+  lwt_react,
   opaline, ppx_tools, ppx_deriving, findlib
 , js_of_ocaml-ocamlbuild, js_of_ocaml-ppx, js_of_ocaml-ppx_deriving_json
 , js_of_ocaml-lwt
diff --git a/pkgs/development/ocaml-modules/janestreet/default.nix b/pkgs/development/ocaml-modules/janestreet/default.nix
index 5c0726176f6d..a8fff893d5c9 100644
--- a/pkgs/development/ocaml-modules/janestreet/default.nix
+++ b/pkgs/development/ocaml-modules/janestreet/default.nix
@@ -1,6 +1,6 @@
-{ stdenv, janePackage, ocamlbuild, angstrom, cryptokit, ctypes,
+{ janePackage, ocamlbuild, angstrom, cryptokit, ctypes,
   magic-mime, ocaml-migrate-parsetree, octavius, ounit, ppx_deriving, re,
-  zarith, num, openssl
+  num, openssl
 , ppxlib
 }:
 
diff --git a/pkgs/development/ocaml-modules/jingoo/default.nix b/pkgs/development/ocaml-modules/jingoo/default.nix
index 0ef3cf167341..30aea547cbd1 100644
--- a/pkgs/development/ocaml-modules/jingoo/default.nix
+++ b/pkgs/development/ocaml-modules/jingoo/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, ocaml, findlib, ounit, pcre, uutf }:
+{ stdenv, fetchFromGitHub, ocaml, findlib, pcre, uutf }:
 
 if !stdenv.lib.versionAtLeast ocaml.version "4.02"
 then throw "jingoo is not available for OCaml ${ocaml.version}"
diff --git a/pkgs/development/ocaml-modules/lwt/ppx.nix b/pkgs/development/ocaml-modules/lwt/ppx.nix
index 7ba22a025f49..fbd061a6566b 100644
--- a/pkgs/development/ocaml-modules/lwt/ppx.nix
+++ b/pkgs/development/ocaml-modules/lwt/ppx.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildDunePackage, lwt, ppx_tools_versioned }:
+{ buildDunePackage, lwt, ppx_tools_versioned }:
 
 buildDunePackage {
   pname = "lwt_ppx";
diff --git a/pkgs/development/ocaml-modules/menhir/generic.nix b/pkgs/development/ocaml-modules/menhir/generic.nix
index bac6cd707940..e69b9dabeabc 100644
--- a/pkgs/development/ocaml-modules/menhir/generic.nix
+++ b/pkgs/development/ocaml-modules/menhir/generic.nix
@@ -1,4 +1,4 @@
-{ version, src, stdenv, fetchurl, ocaml, findlib, ocamlbuild }:
+{ version, src, stdenv, ocaml, findlib, ocamlbuild, ... }:
 
 stdenv.mkDerivation {
   name = "menhir-${version}";
diff --git a/pkgs/development/ocaml-modules/sqlexpr/ppx.nix b/pkgs/development/ocaml-modules/sqlexpr/ppx.nix
index 5ab6ff226f21..7cc455b01957 100644
--- a/pkgs/development/ocaml-modules/sqlexpr/ppx.nix
+++ b/pkgs/development/ocaml-modules/sqlexpr/ppx.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildDunePackage, sqlexpr, ounit
+{ buildDunePackage, sqlexpr, ounit
 , ppx_core, ppx_tools_versioned, re, lwt_ppx
 }:
 
diff --git a/pkgs/development/ocaml-modules/zmq/lwt.nix b/pkgs/development/ocaml-modules/zmq/lwt.nix
index 65595992e2c1..378bcf3acec0 100644
--- a/pkgs/development/ocaml-modules/zmq/lwt.nix
+++ b/pkgs/development/ocaml-modules/zmq/lwt.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildDunePackage, zmq, ocaml_lwt }:
+{ buildDunePackage, zmq, ocaml_lwt }:
 
 buildDunePackage rec {
   pname = "zmq-lwt";
diff --git a/pkgs/development/pharo/vm/default.nix b/pkgs/development/pharo/vm/default.nix
index 5178551df453..a60afcd59ed7 100644
--- a/pkgs/development/pharo/vm/default.nix
+++ b/pkgs/development/pharo/vm/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, pkgsi686Linux, makeWrapper, ...}:
+{ stdenv, callPackage, pkgsi686Linux, ...}:
 
 let
   i686    = pkgsi686Linux.callPackage ./vms.nix {};
diff --git a/pkgs/development/python-modules/Cython/default.nix b/pkgs/development/python-modules/Cython/default.nix
index 277a3b047d1c..7562c3e4fd06 100644
--- a/pkgs/development/python-modules/Cython/default.nix
+++ b/pkgs/development/python-modules/Cython/default.nix
@@ -8,7 +8,6 @@
 , gdb
 , numpy
 , ncurses
-, fetchpatch
 }:
 
 let
diff --git a/pkgs/development/python-modules/JPype1/default.nix b/pkgs/development/python-modules/JPype1/default.nix
index d449ae8bbf69..44ec253fbf78 100644
--- a/pkgs/development/python-modules/JPype1/default.nix
+++ b/pkgs/development/python-modules/JPype1/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, fetchPypi, isPy3k, pytest }:
+{ buildPythonPackage, fetchPypi, pytest }:
 
 buildPythonPackage rec {
   pname = "JPype1";
diff --git a/pkgs/development/python-modules/Nikola/default.nix b/pkgs/development/python-modules/Nikola/default.nix
index c6548f1b5984..52cf7598da8d 100644
--- a/pkgs/development/python-modules/Nikola/default.nix
+++ b/pkgs/development/python-modules/Nikola/default.nix
@@ -2,7 +2,6 @@
 , buildPythonPackage
 , isPy3k
 , fetchPypi
-, fetchpatch
 , doit
 , glibcLocales
 , pytest
diff --git a/pkgs/development/python-modules/Theano/default.nix b/pkgs/development/python-modules/Theano/default.nix
index b2d0aaa5b6b9..554eaf977911 100644
--- a/pkgs/development/python-modules/Theano/default.nix
+++ b/pkgs/development/python-modules/Theano/default.nix
@@ -1,8 +1,6 @@
 { stdenv
 , runCommandCC
-, lib
 , fetchPypi
-, gcc
 , buildPythonPackage
 , isPyPy
 , pythonOlder
diff --git a/pkgs/development/python-modules/agate-excel/default.nix b/pkgs/development/python-modules/agate-excel/default.nix
index 4636f51d4bd1..ced0ff28090d 100644
--- a/pkgs/development/python-modules/agate-excel/default.nix
+++ b/pkgs/development/python-modules/agate-excel/default.nix
@@ -1,4 +1,4 @@
-{ lib, fetchPypi, fetchpatch, buildPythonPackage
+{ lib, fetchPypi, buildPythonPackage
 , agate, openpyxl, xlrd, nose
 }:
 
diff --git a/pkgs/development/python-modules/aiozeroconf/default.nix b/pkgs/development/python-modules/aiozeroconf/default.nix
index 4dc9401d5306..78b1c215c2bd 100644
--- a/pkgs/development/python-modules/aiozeroconf/default.nix
+++ b/pkgs/development/python-modules/aiozeroconf/default.nix
@@ -3,7 +3,6 @@
 , fetchPypi
 , netifaces
 , isPy27
-, python
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/alerta-server/default.nix b/pkgs/development/python-modules/alerta-server/default.nix
index c462c41822ab..9313a255fd05 100644
--- a/pkgs/development/python-modules/alerta-server/default.nix
+++ b/pkgs/development/python-modules/alerta-server/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, makeWrapper, pythonOlder, pyyaml
+{ stdenv, buildPythonPackage, fetchPypi, pythonOlder, pyyaml
 , python-dateutil, requests, pymongo, raven, bcrypt, flask, pyjwt, flask-cors, psycopg2, pytz, flask-compress, jinja2
 }:
 
diff --git a/pkgs/development/python-modules/alerta/default.nix b/pkgs/development/python-modules/alerta/default.nix
index c366fc770b33..257e89790fa9 100644
--- a/pkgs/development/python-modules/alerta/default.nix
+++ b/pkgs/development/python-modules/alerta/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, makeWrapper
+{ stdenv, buildPythonPackage, fetchPypi
 , six, click, requests, pytz, tabulate, pythonOlder
 }:
 
diff --git a/pkgs/development/python-modules/altair/default.nix b/pkgs/development/python-modules/altair/default.nix
index ccba946abbb4..f1f2d728ff2b 100644
--- a/pkgs/development/python-modules/altair/default.nix
+++ b/pkgs/development/python-modules/altair/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, fetchpatch
+{ stdenv, buildPythonPackage, fetchPypi
 , pytest, jinja2, sphinx, vega_datasets, ipython, glibcLocales
 , entrypoints, jsonschema, numpy, pandas, six, toolz, typing
 , pythonOlder, recommonmark }:
diff --git a/pkgs/development/python-modules/arelle/default.nix b/pkgs/development/python-modules/arelle/default.nix
index a0acadd8db75..85033a1846f2 100644
--- a/pkgs/development/python-modules/arelle/default.nix
+++ b/pkgs/development/python-modules/arelle/default.nix
@@ -1,6 +1,6 @@
 { gui ? true,
   buildPythonPackage, fetchFromGitHub, lib,
-  sphinx, lxml, isodate, numpy, pytest, openpyxl,
+  sphinx, lxml, isodate, numpy, openpyxl,
   tkinter ? null, py3to2, isPy3k, python,
   ... }:
 
diff --git a/pkgs/development/python-modules/astroid/1.6.nix b/pkgs/development/python-modules/astroid/1.6.nix
index b6ebea815ccc..cdbbe547aec7 100644
--- a/pkgs/development/python-modules/astroid/1.6.nix
+++ b/pkgs/development/python-modules/astroid/1.6.nix
@@ -1,4 +1,4 @@
-{ lib, fetchPypi, buildPythonPackage, pythonOlder, isPyPy
+{ lib, fetchPypi, buildPythonPackage
 , lazy-object-proxy, six, wrapt, enum34, singledispatch, backports_functools_lru_cache
 , pytest
 }:
diff --git a/pkgs/development/python-modules/asyncssh/default.nix b/pkgs/development/python-modules/asyncssh/default.nix
index a078a4207163..42335a0393fe 100644
--- a/pkgs/development/python-modules/asyncssh/default.nix
+++ b/pkgs/development/python-modules/asyncssh/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, pythonOlder, fetchpatch
+{ stdenv, buildPythonPackage, fetchPypi, pythonOlder
 , cryptography
 , bcrypt, gssapi, libnacl, libsodium, nettle, pyopenssl
 , openssl, openssh }:
diff --git a/pkgs/development/python-modules/av/default.nix b/pkgs/development/python-modules/av/default.nix
index c32719140ea7..8998abd6986a 100644
--- a/pkgs/development/python-modules/av/default.nix
+++ b/pkgs/development/python-modules/av/default.nix
@@ -3,7 +3,6 @@
 , fetchPypi
 , numpy
 , ffmpeg_4
-, libav
 , pkgconfig
 }:
 
diff --git a/pkgs/development/python-modules/azure/default.nix b/pkgs/development/python-modules/azure/default.nix
index 541cf1e72702..87a39255561e 100644
--- a/pkgs/development/python-modules/azure/default.nix
+++ b/pkgs/development/python-modules/azure/default.nix
@@ -5,7 +5,6 @@
 , futures
 , pyopenssl
 , requests
-, pythonOlder
 , isPy3k
 }:
 
diff --git a/pkgs/development/python-modules/backports-shutil-which/default.nix b/pkgs/development/python-modules/backports-shutil-which/default.nix
index 95cbd7ca0411..1b8b8f2ba47e 100644
--- a/pkgs/development/python-modules/backports-shutil-which/default.nix
+++ b/pkgs/development/python-modules/backports-shutil-which/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchPypi, fetchFromGitHub, buildPythonPackage, pytest }:
+{ stdenv, fetchPypi, buildPythonPackage, pytest }:
 
 buildPythonPackage rec {
   pname = "backports.shutil_which";
diff --git a/pkgs/development/python-modules/blis/default.nix b/pkgs/development/python-modules/blis/default.nix
index 5fee40a941f9..e038e07507a0 100644
--- a/pkgs/development/python-modules/blis/default.nix
+++ b/pkgs/development/python-modules/blis/default.nix
@@ -1,5 +1,4 @@
 { stdenv
-, lib
 , buildPythonPackage
 , fetchPypi
 , cython
diff --git a/pkgs/development/python-modules/bsddb3/default.nix b/pkgs/development/python-modules/bsddb3/default.nix
index 700f5b3d0c52..a286249ea0f3 100644
--- a/pkgs/development/python-modules/bsddb3/default.nix
+++ b/pkgs/development/python-modules/bsddb3/default.nix
@@ -2,7 +2,6 @@
 , buildPythonPackage
 , fetchPypi
 , pkgs
-, isPy3k
 , python
 }:
 
diff --git a/pkgs/development/python-modules/buildbot/default.nix b/pkgs/development/python-modules/buildbot/default.nix
index 066d7058fed5..a6f4b73bbf1e 100644
--- a/pkgs/development/python-modules/buildbot/default.nix
+++ b/pkgs/development/python-modules/buildbot/default.nix
@@ -1,7 +1,7 @@
 { stdenv, lib, buildPythonPackage, fetchPypi, makeWrapper, isPy3k,
   python, twisted, jinja2, zope_interface, future, sqlalchemy,
   sqlalchemy_migrate, dateutil, txaio, autobahn, pyjwt, pyyaml, treq,
-  txrequests, txgithub, pyjade, boto3, moto, mock, python-lz4, setuptoolsTrial,
+  txrequests, pyjade, boto3, moto, mock, python-lz4, setuptoolsTrial,
   isort, pylint, flake8, buildbot-worker, buildbot-pkg, parameterized,
   glibcLocales }:
 
diff --git a/pkgs/development/python-modules/buildbot/pkg.nix b/pkgs/development/python-modules/buildbot/pkg.nix
index f95d71dc2903..631572ffa025 100644
--- a/pkgs/development/python-modules/buildbot/pkg.nix
+++ b/pkgs/development/python-modules/buildbot/pkg.nix
@@ -1,4 +1,4 @@
-{ lib, buildPythonPackage, fetchPypi, setuptools }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "buildbot-pkg";
diff --git a/pkgs/development/python-modules/buildbot/worker.nix b/pkgs/development/python-modules/buildbot/worker.nix
index c8ebdf34b868..363e6e8af283 100644
--- a/pkgs/development/python-modules/buildbot/worker.nix
+++ b/pkgs/development/python-modules/buildbot/worker.nix
@@ -1,4 +1,4 @@
-{ lib, buildPythonPackage, fetchPypi, python, setuptoolsTrial, mock, twisted, future }:
+{ lib, buildPythonPackage, fetchPypi, setuptoolsTrial, mock, twisted, future }:
 
 buildPythonPackage (rec {
   pname = "buildbot-worker";
diff --git a/pkgs/development/python-modules/cartopy/default.nix b/pkgs/development/python-modules/cartopy/default.nix
index 28148450f076..e54136a50276 100644
--- a/pkgs/development/python-modules/cartopy/default.nix
+++ b/pkgs/development/python-modules/cartopy/default.nix
@@ -1,6 +1,6 @@
 { buildPythonPackage, lib, fetchPypi
 , pytest, filelock, mock, pep8
-, cython, isPy27, isPy37, glibcLocales
+, cython, isPy27
 , six, pyshp, shapely, geos, proj, numpy
 , gdal, pillow, matplotlib, pyepsg, pykdtree, scipy, owslib, fiona
 , xvfb_run
diff --git a/pkgs/development/python-modules/cassandra-driver/default.nix b/pkgs/development/python-modules/cassandra-driver/default.nix
index dbf5a8686cd9..1551c98143c9 100644
--- a/pkgs/development/python-modules/cassandra-driver/default.nix
+++ b/pkgs/development/python-modules/cassandra-driver/default.nix
@@ -2,7 +2,6 @@
 , libev
 , buildPythonPackage
 , fetchPypi
-, pkgs
 , cython
 , futures
 , six
diff --git a/pkgs/development/python-modules/celery/default.nix b/pkgs/development/python-modules/celery/default.nix
index 41c9493922a9..d499a937f501 100644
--- a/pkgs/development/python-modules/celery/default.nix
+++ b/pkgs/development/python-modules/celery/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, isPy37, fetchpatch, iana-etc, libredirect
+{ stdenv, buildPythonPackage, fetchPypi, iana-etc, libredirect
 , case, pytest, boto3, moto, kombu, billiard, pytz, anyjson, amqp, eventlet
 }:
 
diff --git a/pkgs/development/python-modules/chalice/default.nix b/pkgs/development/python-modules/chalice/default.nix
index f982ffefb2a7..19aaf3368e5d 100644
--- a/pkgs/development/python-modules/chalice/default.nix
+++ b/pkgs/development/python-modules/chalice/default.nix
@@ -11,7 +11,6 @@
 , six
 , typing
 , wheel
-, pythonOlder
 , watchdog
 , pytest
 , hypothesis
diff --git a/pkgs/development/python-modules/click/default.nix b/pkgs/development/python-modules/click/default.nix
index 1ae0cba4844a..9951b1711b39 100644
--- a/pkgs/development/python-modules/click/default.nix
+++ b/pkgs/development/python-modules/click/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildPythonPackage, fetchPypi, substituteAll, locale, pytest }:
+{ lib, buildPythonPackage, fetchPypi, locale, pytest }:
 
 buildPythonPackage rec {
   pname = "click";
diff --git a/pkgs/development/python-modules/cntk/default.nix b/pkgs/development/python-modules/cntk/default.nix
index 564116bc6755..43a7b7646dae 100644
--- a/pkgs/development/python-modules/cntk/default.nix
+++ b/pkgs/development/python-modules/cntk/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , buildPythonPackage
 , pkgs
 , numpy
diff --git a/pkgs/development/python-modules/dask-xgboost/default.nix b/pkgs/development/python-modules/dask-xgboost/default.nix
index 06b5e762852a..5dfcd2f415b9 100644
--- a/pkgs/development/python-modules/dask-xgboost/default.nix
+++ b/pkgs/development/python-modules/dask-xgboost/default.nix
@@ -6,7 +6,6 @@
 , distributed
 , pytest
 , scikitlearn
-, scipy
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/distro/default.nix b/pkgs/development/python-modules/distro/default.nix
index 09868b2f7555..ad8da4255d69 100644
--- a/pkgs/development/python-modules/distro/default.nix
+++ b/pkgs/development/python-modules/distro/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchPypi, buildPythonPackage, pytest, pytestcov, tox }:
+{ stdenv, fetchPypi, buildPythonPackage, pytest, pytestcov }:
 
 buildPythonPackage rec {
   pname = "distro";
diff --git a/pkgs/development/python-modules/dj-search-url/default.nix b/pkgs/development/python-modules/dj-search-url/default.nix
index b66f6b8f73a3..68fe4c913d69 100644
--- a/pkgs/development/python-modules/dj-search-url/default.nix
+++ b/pkgs/development/python-modules/dj-search-url/default.nix
@@ -1,7 +1,6 @@
 { stdenv
 , buildPythonPackage
 , fetchPypi
-, python
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/django/1_11.nix b/pkgs/development/python-modules/django/1_11.nix
index 90fd82f28f46..e4e4d129a8d0 100644
--- a/pkgs/development/python-modules/django/1_11.nix
+++ b/pkgs/development/python-modules/django/1_11.nix
@@ -1,5 +1,4 @@
 { stdenv, buildPythonPackage, fetchurl, substituteAll,
-  pythonOlder,
   geos, gdal, pytz,
   withGdal ? false
 }:
diff --git a/pkgs/development/python-modules/django/1_8.nix b/pkgs/development/python-modules/django/1_8.nix
index ee2408f73405..b6b51a07e9f6 100644
--- a/pkgs/development/python-modules/django/1_8.nix
+++ b/pkgs/development/python-modules/django/1_8.nix
@@ -1,7 +1,6 @@
 { stdenv
 , buildPythonPackage
 , fetchurl
-, pythonOlder
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/django_guardian/default.nix b/pkgs/development/python-modules/django_guardian/default.nix
index 11ad13cb4a1a..007d70ca8106 100644
--- a/pkgs/development/python-modules/django_guardian/default.nix
+++ b/pkgs/development/python-modules/django_guardian/default.nix
@@ -1,5 +1,5 @@
 { stdenv, buildPythonPackage, fetchPypi
-, django_environ, mock, django, six
+, django_environ, mock, django
 , pytest, pytestrunner, pytest-django
 }:
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/dynd/default.nix b/pkgs/development/python-modules/dynd/default.nix
index 337763afbd46..d4cd0e711a0d 100644
--- a/pkgs/development/python-modules/dynd/default.nix
+++ b/pkgs/development/python-modules/dynd/default.nix
@@ -1,6 +1,5 @@
 { stdenv
 , buildPythonPackage
-, fetchFromGitHub
 , isPyPy
 , isPy3k
 , cython
diff --git a/pkgs/development/python-modules/effect/default.nix b/pkgs/development/python-modules/effect/default.nix
index 8e4ad446746a..6b8329550da3 100644
--- a/pkgs/development/python-modules/effect/default.nix
+++ b/pkgs/development/python-modules/effect/default.nix
@@ -1,6 +1,5 @@
 { buildPythonPackage
 , fetchPypi
-, isPy37
 , lib
 , six
 , attrs
diff --git a/pkgs/development/python-modules/elasticsearch-dsl/default.nix b/pkgs/development/python-modules/elasticsearch-dsl/default.nix
index 1ca8c9b55ff2..b906f94b4272 100644
--- a/pkgs/development/python-modules/elasticsearch-dsl/default.nix
+++ b/pkgs/development/python-modules/elasticsearch-dsl/default.nix
@@ -5,7 +5,6 @@
 , elasticsearch
 , ipaddress
 , python-dateutil
-, pytz
 , six
 }:
 
diff --git a/pkgs/development/python-modules/eyed3/default.nix b/pkgs/development/python-modules/eyed3/default.nix
index 16e94bd785f0..a06f276232ef 100644
--- a/pkgs/development/python-modules/eyed3/default.nix
+++ b/pkgs/development/python-modules/eyed3/default.nix
@@ -9,7 +9,6 @@
 , six
 , pathlib
 , python_magic
-, isPy3k
 , lib
 }:
 
diff --git a/pkgs/development/python-modules/fastentrypoints/default.nix b/pkgs/development/python-modules/fastentrypoints/default.nix
index 4a921b2390d7..e2e0a4d4d92e 100644
--- a/pkgs/development/python-modules/fastentrypoints/default.nix
+++ b/pkgs/development/python-modules/fastentrypoints/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, pytest }:
+{ stdenv, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "fastentrypoints";
diff --git a/pkgs/development/python-modules/fastparquet/default.nix b/pkgs/development/python-modules/fastparquet/default.nix
index a31b5670732a..260d1b7f4b30 100644
--- a/pkgs/development/python-modules/fastparquet/default.nix
+++ b/pkgs/development/python-modules/fastparquet/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildPythonPackage, isPy3k, fetchPypi, fetchpatch, numba, numpy, pandas,
+{ lib, buildPythonPackage, fetchPypi, fetchpatch, numba, numpy, pandas,
 pytestrunner, thrift, pytest, python-snappy, lz4 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/fb-re2/default.nix b/pkgs/development/python-modules/fb-re2/default.nix
index 40a1d759c127..25aae4591eb5 100644
--- a/pkgs/development/python-modules/fb-re2/default.nix
+++ b/pkgs/development/python-modules/fb-re2/default.nix
@@ -2,7 +2,6 @@
 , buildPythonPackage
 , fetchPypi
 , re2
-, pytest
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/flake8/default.nix b/pkgs/development/python-modules/flake8/default.nix
index 675e5ea86f59..a860ea152ebb 100644
--- a/pkgs/development/python-modules/flake8/default.nix
+++ b/pkgs/development/python-modules/flake8/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, pythonOlder, fetchpatch
+{ stdenv, buildPythonPackage, fetchPypi, pythonOlder
 , mock, pytest, pytestrunner
 , configparser, enum34, mccabe, pycodestyle, pyflakes, entrypoints, functools32, typing
 }:
diff --git a/pkgs/development/python-modules/gateone/default.nix b/pkgs/development/python-modules/gateone/default.nix
index 136c089ee4b6..e0b6b3e49fa4 100644
--- a/pkgs/development/python-modules/gateone/default.nix
+++ b/pkgs/development/python-modules/gateone/default.nix
@@ -1,6 +1,5 @@
 { stdenv
 , buildPythonPackage
-, fetchFromGitHub
 , tornado
 , futures
 , html5lib
diff --git a/pkgs/development/python-modules/genpy/default.nix b/pkgs/development/python-modules/genpy/default.nix
index 0a8344f8b924..c8bbeefd6acd 100644
--- a/pkgs/development/python-modules/genpy/default.nix
+++ b/pkgs/development/python-modules/genpy/default.nix
@@ -3,7 +3,6 @@
 , fetchPypi
 , pytools
 , numpy
-, pytest
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/gipc/default.nix b/pkgs/development/python-modules/gipc/default.nix
index e2065e632d23..8255668de1cf 100644
--- a/pkgs/development/python-modules/gipc/default.nix
+++ b/pkgs/development/python-modules/gipc/default.nix
@@ -1,7 +1,6 @@
 { stdenv
 , buildPythonPackage
 , fetchPypi
-, isPy3k
 , gevent
 }:
 
diff --git a/pkgs/development/python-modules/google-api-python-client/default.nix b/pkgs/development/python-modules/google-api-python-client/default.nix
index d59bc5a70b89..1acc9603db34 100644
--- a/pkgs/development/python-modules/google-api-python-client/default.nix
+++ b/pkgs/development/python-modules/google-api-python-client/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildPythonPackage, fetchPypi, isPy3k
+{ lib, buildPythonPackage, fetchPypi
 , httplib2, google_auth, google-auth-httplib2, six, uritemplate, oauth2client }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/grpcio-tools/default.nix b/pkgs/development/python-modules/grpcio-tools/default.nix
index 4e548577f906..f16a5800bb44 100644
--- a/pkgs/development/python-modules/grpcio-tools/default.nix
+++ b/pkgs/development/python-modules/grpcio-tools/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, lib, grpc, grpcio}:
+{ stdenv, buildPythonPackage, fetchPypi, lib, grpcio}:
 
 buildPythonPackage rec {
   pname = "grpcio-tools";
diff --git a/pkgs/development/python-modules/gtimelog/default.nix b/pkgs/development/python-modules/gtimelog/default.nix
index 7f0ba451af67..c729874846da 100644
--- a/pkgs/development/python-modules/gtimelog/default.nix
+++ b/pkgs/development/python-modules/gtimelog/default.nix
@@ -1,6 +1,5 @@
 { stdenv
 , buildPythonPackage
-, fetchurl
 , pkgs
 , python
 , pygobject3
diff --git a/pkgs/development/python-modules/gumath/default.nix b/pkgs/development/python-modules/gumath/default.nix
index b066f323d682..2937b876dec4 100644
--- a/pkgs/development/python-modules/gumath/default.nix
+++ b/pkgs/development/python-modules/gumath/default.nix
@@ -1,5 +1,4 @@
-{ lib
-, buildPythonPackage
+{ buildPythonPackage
 , numba
 , ndtypes
 , xnd
diff --git a/pkgs/development/python-modules/hbmqtt/default.nix b/pkgs/development/python-modules/hbmqtt/default.nix
index 0ec55dae3e4d..cd3264b78bb2 100644
--- a/pkgs/development/python-modules/hbmqtt/default.nix
+++ b/pkgs/development/python-modules/hbmqtt/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, fetchpatch, isPy3k
+{ stdenv, buildPythonPackage, fetchPypi, isPy3k
 , transitions, websockets, passlib, docopt, pyyaml, nose }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/hoomd-blue/default.nix b/pkgs/development/python-modules/hoomd-blue/default.nix
index ad25b8977c05..c4afe809cfb6 100644
--- a/pkgs/development/python-modules/hoomd-blue/default.nix
+++ b/pkgs/development/python-modules/hoomd-blue/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchgit
+{ stdenv, fetchgit
 , cmake, pkgconfig
 , python
 , mpi ? null
diff --git a/pkgs/development/python-modules/howdoi/default.nix b/pkgs/development/python-modules/howdoi/default.nix
index bbea01f49001..53e42027ba22 100644
--- a/pkgs/development/python-modules/howdoi/default.nix
+++ b/pkgs/development/python-modules/howdoi/default.nix
@@ -5,7 +5,6 @@
 , requests-cache
 , pygments
 , pyquery
-, python
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/httpretty/default.nix b/pkgs/development/python-modules/httpretty/default.nix
index 7d8f25ca9540..cf78a6185365 100644
--- a/pkgs/development/python-modules/httpretty/default.nix
+++ b/pkgs/development/python-modules/httpretty/default.nix
@@ -8,8 +8,6 @@
 , nose
 , nose-exclude
 , coverage
-, certifi
-, urllib3
 , rednose
 , nose-randomly
 , six
diff --git a/pkgs/development/python-modules/hyperlink/default.nix b/pkgs/development/python-modules/hyperlink/default.nix
index 2e2e4e1cb774..d7950d3adb69 100644
--- a/pkgs/development/python-modules/hyperlink/default.nix
+++ b/pkgs/development/python-modules/hyperlink/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, idna, pytest }:
+{ stdenv, buildPythonPackage, fetchPypi, idna }:
 
 buildPythonPackage rec {
   pname = "hyperlink";
diff --git a/pkgs/development/python-modules/ifaddr/default.nix b/pkgs/development/python-modules/ifaddr/default.nix
index 5bc281d2be1e..e5087a105360 100644
--- a/pkgs/development/python-modules/ifaddr/default.nix
+++ b/pkgs/development/python-modules/ifaddr/default.nix
@@ -3,7 +3,6 @@
 , fetchPypi
 , ipaddress
 , python
-, pythonOlder
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/influxgraph/default.nix b/pkgs/development/python-modules/influxgraph/default.nix
index 4f7ba65a27f3..eeb27b14080a 100644
--- a/pkgs/development/python-modules/influxgraph/default.nix
+++ b/pkgs/development/python-modules/influxgraph/default.nix
@@ -1,5 +1,5 @@
 { stdenv, buildPythonPackage, fetchPypi, isPy3k
-, influxdb, graphite_api, memcached, gnugrep
+, influxdb, graphite_api, memcached
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/infoqscraper/default.nix b/pkgs/development/python-modules/infoqscraper/default.nix
index f9ced7e63daf..ce265d013785 100644
--- a/pkgs/development/python-modules/infoqscraper/default.nix
+++ b/pkgs/development/python-modules/infoqscraper/default.nix
@@ -1,6 +1,5 @@
 { stdenv
 , buildPythonPackage
-, fetchFromGitHub
 , html5lib
 , six
 , beautifulsoup4
diff --git a/pkgs/development/python-modules/intake/default.nix b/pkgs/development/python-modules/intake/default.nix
index 2646ee1b9363..c7f6e5c82194 100644
--- a/pkgs/development/python-modules/intake/default.nix
+++ b/pkgs/development/python-modules/intake/default.nix
@@ -15,7 +15,6 @@
 , six
 , tornado
 , pytest
-, pythonOlder
 , isPy27
 }:
 
diff --git a/pkgs/development/python-modules/intelhex/default.nix b/pkgs/development/python-modules/intelhex/default.nix
index 6ed21597aff0..20098485ad48 100644
--- a/pkgs/development/python-modules/intelhex/default.nix
+++ b/pkgs/development/python-modules/intelhex/default.nix
@@ -2,7 +2,6 @@
 , buildPythonPackage
 , fetchPypi
 , fetchpatch
-, fetchurl
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/ipython/5.nix b/pkgs/development/python-modules/ipython/5.nix
index 3709ba40dc03..15e7d00bcece 100644
--- a/pkgs/development/python-modules/ipython/5.nix
+++ b/pkgs/development/python-modules/ipython/5.nix
@@ -2,7 +2,6 @@
 , stdenv
 , buildPythonPackage
 , fetchPypi
-, fetchpatch
 # Build dependencies
 , glibcLocales
 # Test dependencies
diff --git a/pkgs/development/python-modules/isodate/default.nix b/pkgs/development/python-modules/isodate/default.nix
index 4422e1614fb6..425a295e5a53 100644
--- a/pkgs/development/python-modules/isodate/default.nix
+++ b/pkgs/development/python-modules/isodate/default.nix
@@ -1,7 +1,6 @@
 { stdenv
 , buildPythonPackage
 , fetchPypi
-, isPy3k
 , python
 , six
 }:
diff --git a/pkgs/development/python-modules/jenkins-job-builder/default.nix b/pkgs/development/python-modules/jenkins-job-builder/default.nix
index 764e47501cb3..6d9086748572 100644
--- a/pkgs/development/python-modules/jenkins-job-builder/default.nix
+++ b/pkgs/development/python-modules/jenkins-job-builder/default.nix
@@ -1,7 +1,6 @@
 { stdenv
 , buildPythonPackage
 , fetchPypi
-, pip
 , pbr
 , mock
 , python-jenkins
diff --git a/pkgs/development/python-modules/jsbeautifier/default.nix b/pkgs/development/python-modules/jsbeautifier/default.nix
index 226f1743a2a0..15191858daa8 100644
--- a/pkgs/development/python-modules/jsbeautifier/default.nix
+++ b/pkgs/development/python-modules/jsbeautifier/default.nix
@@ -1,4 +1,4 @@
-{ lib, fetchPypi, buildPythonApplication, EditorConfig, fetchpatch, pytest, six }:
+{ lib, fetchPypi, buildPythonApplication, EditorConfig, pytest, six }:
 
 buildPythonApplication rec {
   pname = "jsbeautifier";
diff --git a/pkgs/development/python-modules/keyrings-alt/default.nix b/pkgs/development/python-modules/keyrings-alt/default.nix
index beccc2f06b89..3fe986fc3351 100644
--- a/pkgs/development/python-modules/keyrings-alt/default.nix
+++ b/pkgs/development/python-modules/keyrings-alt/default.nix
@@ -1,5 +1,5 @@
 { stdenv, buildPythonPackage, fetchPypi, pythonOlder, six
-, pytest, pytest-flake8, backports_unittest-mock, keyring, setuptools_scm
+, pytest, backports_unittest-mock, keyring, setuptools_scm
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/lark-parser/default.nix b/pkgs/development/python-modules/lark-parser/default.nix
index 08c9e8b763dc..6de2af1e505e 100644
--- a/pkgs/development/python-modules/lark-parser/default.nix
+++ b/pkgs/development/python-modules/lark-parser/default.nix
@@ -1,7 +1,6 @@
 { lib
 , buildPythonPackage
 , fetchFromGitHub
-, python
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/ldap3/default.nix b/pkgs/development/python-modules/ldap3/default.nix
index fc5b0b2fe045..13fe196e471c 100644
--- a/pkgs/development/python-modules/ldap3/default.nix
+++ b/pkgs/development/python-modules/ldap3/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchPypi, fetchFromGitHub, buildPythonPackage, pyasn1 }:
+{ stdenv, fetchPypi, buildPythonPackage, pyasn1 }:
 
 buildPythonPackage rec {
   pname = "ldap3";
diff --git a/pkgs/development/python-modules/libsexy/default.nix b/pkgs/development/python-modules/libsexy/default.nix
index 03797575a83e..78e0dae2634c 100644
--- a/pkgs/development/python-modules/libsexy/default.nix
+++ b/pkgs/development/python-modules/libsexy/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, buildPythonPackage, libsexy, pkgconfig, libxml2, pygtk, pango, gtk2, glib, python }:
+{ stdenv, fetchurl, buildPythonPackage, libsexy, pkgconfig, libxml2, pygtk, pango, glib, python }:
 
 buildPythonPackage rec {
   pname = "libsexy";
diff --git a/pkgs/development/python-modules/libusb1/default.nix b/pkgs/development/python-modules/libusb1/default.nix
index 9b268686b8ff..a2065f243169 100644
--- a/pkgs/development/python-modules/libusb1/default.nix
+++ b/pkgs/development/python-modules/libusb1/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchPypi, python, libusb1, pytest }:
+{ stdenv, buildPythonPackage, fetchPypi, libusb1, pytest }:
 
 buildPythonPackage rec {
   pname = "libusb1";
diff --git a/pkgs/development/python-modules/livestreamer/default.nix b/pkgs/development/python-modules/livestreamer/default.nix
index 94394c11e04e..a316edaf80aa 100644
--- a/pkgs/development/python-modules/livestreamer/default.nix
+++ b/pkgs/development/python-modules/livestreamer/default.nix
@@ -1,6 +1,5 @@
 { stdenv
 , buildPythonPackage
-, fetchurl
 , pkgs
 , isPyPy
 , pycrypto
diff --git a/pkgs/development/python-modules/matplotlib/default.nix b/pkgs/development/python-modules/matplotlib/default.nix
index cbdd43af811f..392cc66786a1 100644
--- a/pkgs/development/python-modules/matplotlib/default.nix
+++ b/pkgs/development/python-modules/matplotlib/default.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchPypi, python, buildPythonPackage, isPy3k, pycairo, backports_functools_lru_cache
 , which, cycler, dateutil, nose, numpy, pyparsing, sphinx, tornado, kiwisolver
-, freetype, libpng, pkgconfig, mock, pytz, pygobject3, functools32, subprocess32
+, freetype, libpng, pkgconfig, mock, pytz, pygobject3
 , enableGhostscript ? true, ghostscript ? null, gtk3
 , enableGtk2 ? false, pygtk ? null, gobject-introspection
 , enableGtk3 ? false, cairo
diff --git a/pkgs/development/python-modules/minio/default.nix b/pkgs/development/python-modules/minio/default.nix
index 7eea7596f433..a87c6711d435 100644
--- a/pkgs/development/python-modules/minio/default.nix
+++ b/pkgs/development/python-modules/minio/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, isPy3k, fetchPypi
+{ lib, buildPythonPackage, isPy3k, fetchPypi
 , urllib3, python-dateutil , pytz, faker, mock, nose }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/moinmoin/default.nix b/pkgs/development/python-modules/moinmoin/default.nix
index 8090ac199da8..cc00643b71ae 100644
--- a/pkgs/development/python-modules/moinmoin/default.nix
+++ b/pkgs/development/python-modules/moinmoin/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildPythonPackage, fetchurl, fetchpatch, isPy3k
+{ lib, buildPythonPackage, fetchurl, isPy3k
 , pytest, werkzeug, pygments
 }:
 
diff --git a/pkgs/development/python-modules/moviepy/default.nix b/pkgs/development/python-modules/moviepy/default.nix
index 7171409bec84..73c2f6c8e684 100644
--- a/pkgs/development/python-modules/moviepy/default.nix
+++ b/pkgs/development/python-modules/moviepy/default.nix
@@ -6,7 +6,6 @@
 , decorator
 , imageio
 , imageio-ffmpeg
-, isPy3k
 , proglog
 , requests
 , tqdm
diff --git a/pkgs/development/python-modules/msrestazure/default.nix b/pkgs/development/python-modules/msrestazure/default.nix
index 7e71f618d8a0..a494bbfff07e 100644
--- a/pkgs/development/python-modules/msrestazure/default.nix
+++ b/pkgs/development/python-modules/msrestazure/default.nix
@@ -1,7 +1,6 @@
 { pkgs
 , buildPythonPackage
 , fetchPypi
-, python
 , adal
 , msrest
 }:
diff --git a/pkgs/development/python-modules/ndtypes/default.nix b/pkgs/development/python-modules/ndtypes/default.nix
index 2110f3628a80..0d5923820d27 100644
--- a/pkgs/development/python-modules/ndtypes/default.nix
+++ b/pkgs/development/python-modules/ndtypes/default.nix
@@ -1,6 +1,4 @@
-{ lib
-, buildPythonPackage
-, fetchFromGitHub
+{ buildPythonPackage
 , numpy
 , libndtypes
 , isPy27
diff --git a/pkgs/development/python-modules/nixpkgs/default.nix b/pkgs/development/python-modules/nixpkgs/default.nix
index ea0a359a49c3..75dcf9b32c4c 100644
--- a/pkgs/development/python-modules/nixpkgs/default.nix
+++ b/pkgs/development/python-modules/nixpkgs/default.nix
@@ -1,6 +1,5 @@
 { stdenv
 , buildPythonPackage
-, fetchpatch
 , fetchPypi
 , pbr
 , pythonix
diff --git a/pkgs/development/python-modules/nltk/default.nix b/pkgs/development/python-modules/nltk/default.nix
index 2c6858915ce9..7e3134a44d20 100644
--- a/pkgs/development/python-modules/nltk/default.nix
+++ b/pkgs/development/python-modules/nltk/default.nix
@@ -1,4 +1,4 @@
-{ fetchPypi, buildPythonPackage, lib, six, singledispatch, isPy3k, fetchpatch }:
+{ fetchPypi, buildPythonPackage, lib, six, singledispatch, isPy3k }:
 
 buildPythonPackage rec {
   version = "3.4.3";
diff --git a/pkgs/development/python-modules/nuitka/default.nix b/pkgs/development/python-modules/nuitka/default.nix
index bf5ca3d55830..51b1c8dd7756 100644
--- a/pkgs/development/python-modules/nuitka/default.nix
+++ b/pkgs/development/python-modules/nuitka/default.nix
@@ -3,7 +3,6 @@
 , fetchurl
 , vmprof
 , pyqt4
-, scons
 , isPyPy
 , pkgs
 }:
diff --git a/pkgs/development/python-modules/numpy/default.nix b/pkgs/development/python-modules/numpy/default.nix
index 171496584ef2..880d368a600b 100644
--- a/pkgs/development/python-modules/numpy/default.nix
+++ b/pkgs/development/python-modules/numpy/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchPypi, python, buildPythonPackage, gfortran, pytest, blas, writeTextFile }:
+{ lib, fetchPypi, python, buildPythonPackage, gfortran, pytest, blas, writeTextFile }:
 
 let
   blasImplementation = lib.nameFromURL blas.name "-";
diff --git a/pkgs/development/python-modules/odfpy/default.nix b/pkgs/development/python-modules/odfpy/default.nix
index f4dba0858dbf..c62f6ae681c2 100644
--- a/pkgs/development/python-modules/odfpy/default.nix
+++ b/pkgs/development/python-modules/odfpy/default.nix
@@ -1,8 +1,6 @@
 { lib
 , buildPythonPackage
 , fetchPypi
-, python
-, isPy27
 , defusedxml
 , pytest
 }:
diff --git a/pkgs/development/python-modules/ovito/default.nix b/pkgs/development/python-modules/ovito/default.nix
index cae337904b20..73230b2e8fb3 100644
--- a/pkgs/development/python-modules/ovito/default.nix
+++ b/pkgs/development/python-modules/ovito/default.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchgit
 , cmake
-, qtbase, libav, netcdf, qscintilla, zlib, boost, git, fftw, hdf5, libssh
+, libav, netcdf, qscintilla, zlib, boost, git, fftw, hdf5, libssh
 , pythonPackages
 }:
 
diff --git a/pkgs/development/python-modules/panel/default.nix b/pkgs/development/python-modules/panel/default.nix
index 821a543eeb17..fccd46c605db 100644
--- a/pkgs/development/python-modules/panel/default.nix
+++ b/pkgs/development/python-modules/panel/default.nix
@@ -7,12 +7,6 @@
 , markdown
 , pyct
 , testpath
-, pytest
-, scipy
-, plotly
-, altair
-, vega_datasets
-, hvplot
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/papis/default.nix b/pkgs/development/python-modules/papis/default.nix
index 32c945f332a7..a1fdeec28f83 100644
--- a/pkgs/development/python-modules/papis/default.nix
+++ b/pkgs/development/python-modules/papis/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildPythonPackage, fetchFromGitHub, fetchpatch, xdg_utils
+{ lib, buildPythonPackage, fetchFromGitHub, xdg_utils
 , requests, filetype, pyparsing, configparser, arxiv2bib
 , pyyaml, chardet, beautifulsoup4, colorama, bibtexparser
 , pylibgen, click, python-slugify, habanero, isbnlib
diff --git a/pkgs/development/python-modules/paramiko/default.nix b/pkgs/development/python-modules/paramiko/default.nix
index e41ec9689d28..a1ecced51eb5 100644
--- a/pkgs/development/python-modules/paramiko/default.nix
+++ b/pkgs/development/python-modules/paramiko/default.nix
@@ -5,12 +5,9 @@
 , bcrypt
 , pynacl
 , pyasn1
-, python
 , pytest
 , pytest-relaxed
 , mock
-, isPyPy
-, isPy33
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pastel/default.nix b/pkgs/development/python-modules/pastel/default.nix
index 2d99447f724f..532970c62c28 100644
--- a/pkgs/development/python-modules/pastel/default.nix
+++ b/pkgs/development/python-modules/pastel/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildPythonPackage, fetchFromGitHub, isPy3k, pytest }:
+{ lib, buildPythonPackage, fetchFromGitHub, pytest }:
 
 buildPythonPackage rec {
   pname = "pastel";
diff --git a/pkgs/development/python-modules/pep8/default.nix b/pkgs/development/python-modules/pep8/default.nix
index 85d274944a78..6794b6f5f668 100644
--- a/pkgs/development/python-modules/pep8/default.nix
+++ b/pkgs/development/python-modules/pep8/default.nix
@@ -1,7 +1,6 @@
 { stdenv
 , buildPythonPackage
 , fetchPypi
-, pythonAtLeast
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pims/default.nix b/pkgs/development/python-modules/pims/default.nix
index 4e45d5203e66..4504886d03d0 100644
--- a/pkgs/development/python-modules/pims/default.nix
+++ b/pkgs/development/python-modules/pims/default.nix
@@ -6,7 +6,6 @@
 , six
 , numpy
 , tifffile
-, pytest
 , nose
 }:
 
diff --git a/pkgs/development/python-modules/poetry/jsonschema.nix b/pkgs/development/python-modules/poetry/jsonschema.nix
index d0adb43daf84..35607b536f34 100644
--- a/pkgs/development/python-modules/poetry/jsonschema.nix
+++ b/pkgs/development/python-modules/poetry/jsonschema.nix
@@ -1,4 +1,4 @@
-{ lib, buildPythonPackage, fetchPypi, isPy27, callPackage
+{ lib, buildPythonPackage, fetchPypi, isPy27
 , attrs
 , pyrsistent
 , six
diff --git a/pkgs/development/python-modules/pplpy/default.nix b/pkgs/development/python-modules/pplpy/default.nix
index 6f118a51c879..a693c8cad4cc 100644
--- a/pkgs/development/python-modules/pplpy/default.nix
+++ b/pkgs/development/python-modules/pplpy/default.nix
@@ -1,12 +1,10 @@
 { lib
-, python
 , fetchPypi
 , buildPythonPackage
 , gmp
 , mpfr
 , libmpc
 , ppl
-, pari
 , cython
 , cysignals
 , gmpy2
diff --git a/pkgs/development/python-modules/priority/default.nix b/pkgs/development/python-modules/priority/default.nix
index f2f7a935cc41..f6e7efb78c20 100644
--- a/pkgs/development/python-modules/priority/default.nix
+++ b/pkgs/development/python-modules/priority/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildPythonPackage, fetchPypi, fetchpatch, pytest, hypothesis }:
+{ lib, buildPythonPackage, fetchPypi, pytest, hypothesis }:
 
 buildPythonPackage rec {
   pname = "priority";
diff --git a/pkgs/development/python-modules/progressbar/default.nix b/pkgs/development/python-modules/progressbar/default.nix
index a68ecf59ad0e..fcd802b34875 100644
--- a/pkgs/development/python-modules/progressbar/default.nix
+++ b/pkgs/development/python-modules/progressbar/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, isPy3k }:
+{ stdenv, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "progressbar";
diff --git a/pkgs/development/python-modules/py3status/default.nix b/pkgs/development/python-modules/py3status/default.nix
index 8cca405f7bfd..033cb192c8ef 100644
--- a/pkgs/development/python-modules/py3status/default.nix
+++ b/pkgs/development/python-modules/py3status/default.nix
@@ -1,7 +1,6 @@
 { stdenv
 , buildPythonPackage
 , fetchPypi
-, fetchpatch
 , requests
 , pytz
 , tzlocal
diff --git a/pkgs/development/python-modules/pyarrow/default.nix b/pkgs/development/python-modules/pyarrow/default.nix
index 32c5f38b66d0..44acbe5c7a9d 100644
--- a/pkgs/development/python-modules/pyarrow/default.nix
+++ b/pkgs/development/python-modules/pyarrow/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildPythonPackage, python, isPy3k, fetchurl, arrow-cpp, cmake, cython, futures, hypothesis, numpy, pandas, pytest, pkgconfig, setuptools_scm, six }:
+{ lib, buildPythonPackage, python, isPy3k, arrow-cpp, cmake, cython, futures, hypothesis, numpy, pandas, pytest, pkgconfig, setuptools_scm, six }:
 
 let
   _arrow-cpp = arrow-cpp.override { inherit python; };
diff --git a/pkgs/development/python-modules/pyasn1-modules/default.nix b/pkgs/development/python-modules/pyasn1-modules/default.nix
index 9817a73be92c..446ec81bb4f8 100644
--- a/pkgs/development/python-modules/pyasn1-modules/default.nix
+++ b/pkgs/development/python-modules/pyasn1-modules/default.nix
@@ -2,7 +2,6 @@
 , buildPythonPackage
 , fetchPypi
 , pyasn1
-, isPyPy
 , pytest
 }:
 
diff --git a/pkgs/development/python-modules/pyblock/default.nix b/pkgs/development/python-modules/pyblock/default.nix
index 5027619d74c8..eb6de23e0eaa 100644
--- a/pkgs/development/python-modules/pyblock/default.nix
+++ b/pkgs/development/python-modules/pyblock/default.nix
@@ -1,5 +1,4 @@
 { stdenv
-, fetchurl
 , python
 , pkgs
 , isPy3k
diff --git a/pkgs/development/python-modules/pyflakes/default.nix b/pkgs/development/python-modules/pyflakes/default.nix
index 026e5626c023..5ea7ba9c7a89 100644
--- a/pkgs/development/python-modules/pyflakes/default.nix
+++ b/pkgs/development/python-modules/pyflakes/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, isPyPy, unittest2 }:
+{ stdenv, buildPythonPackage, fetchPypi, unittest2 }:
 
 buildPythonPackage rec {
   pname = "pyflakes";
diff --git a/pkgs/development/python-modules/pyftgl/default.nix b/pkgs/development/python-modules/pyftgl/default.nix
index 1163f007b092..2b20ba956009 100644
--- a/pkgs/development/python-modules/pyftgl/default.nix
+++ b/pkgs/development/python-modules/pyftgl/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildPythonPackage, fetchFromGitHub, isPy3k
+{ lib, buildPythonPackage, fetchFromGitHub
 , boost, freetype, ftgl, libGLU_combined
 , python
 }:
diff --git a/pkgs/development/python-modules/pyftpdlib/default.nix b/pkgs/development/python-modules/pyftpdlib/default.nix
index e0f0f25c9add..9fc654292ab3 100644
--- a/pkgs/development/python-modules/pyftpdlib/default.nix
+++ b/pkgs/development/python-modules/pyftpdlib/default.nix
@@ -5,7 +5,6 @@
 , psutil
 , pyopenssl
 , pysendfile
-, python
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pygame_sdl2/default.nix b/pkgs/development/python-modules/pygame_sdl2/default.nix
index 18eced7e8067..ab46a5670eeb 100644
--- a/pkgs/development/python-modules/pygame_sdl2/default.nix
+++ b/pkgs/development/python-modules/pygame_sdl2/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchurl, isPy27, fetchpatch
+{ stdenv, buildPythonPackage, fetchurl, isPy27
 , cython, SDL2, SDL2_image, SDL2_ttf, SDL2_mixer, libjpeg, libpng }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pygmo/default.nix b/pkgs/development/python-modules/pygmo/default.nix
index 30e4444f5527..507310b4c51e 100644
--- a/pkgs/development/python-modules/pygmo/default.nix
+++ b/pkgs/development/python-modules/pygmo/default.nix
@@ -1,5 +1,4 @@
 { lib
-, fetchFromGitHub
 , buildPythonPackage
 , eigen
 , nlopt
diff --git a/pkgs/development/python-modules/pyhepmc/default.nix b/pkgs/development/python-modules/pyhepmc/default.nix
index acb5c9648783..0ff269c98740 100644
--- a/pkgs/development/python-modules/pyhepmc/default.nix
+++ b/pkgs/development/python-modules/pyhepmc/default.nix
@@ -3,7 +3,6 @@
 , fetchPypi
 , fetchFromBitbucket
 , isPy3k
-, fetchurl
 , pkgs
 , python
 }:
diff --git a/pkgs/development/python-modules/pylint/1.9.nix b/pkgs/development/python-modules/pylint/1.9.nix
index a88b5ba7356c..c088ea6a3967 100644
--- a/pkgs/development/python-modules/pylint/1.9.nix
+++ b/pkgs/development/python-modules/pylint/1.9.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchPypi, python, astroid, six, isort,
+{ stdenv, lib, buildPythonPackage, fetchPypi, astroid, six, isort,
   mccabe, configparser, backports_functools_lru_cache, singledispatch,
   pytest, pytestrunner, pyenchant }:
 
diff --git a/pkgs/development/python-modules/pylint/default.nix b/pkgs/development/python-modules/pylint/default.nix
index 64259872ce32..4faeb05280d0 100644
--- a/pkgs/development/python-modules/pylint/default.nix
+++ b/pkgs/development/python-modules/pylint/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchPypi, python, pythonOlder, astroid,
+{ stdenv, lib, buildPythonPackage, fetchPypi, pythonOlder, astroid,
   isort, mccabe, pytest, pytestrunner }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pymatgen-lammps/default.nix b/pkgs/development/python-modules/pymatgen-lammps/default.nix
index dbe9107c7c83..c38f56885d14 100644
--- a/pkgs/development/python-modules/pymatgen-lammps/default.nix
+++ b/pkgs/development/python-modules/pymatgen-lammps/default.nix
@@ -2,7 +2,6 @@
 , fetchurl
 , buildPythonPackage
 , pymatgen
-, lammps
 , pytestrunner
 , pytest
 , isPy3k
diff --git a/pkgs/development/python-modules/pyparted/default.nix b/pkgs/development/python-modules/pyparted/default.nix
index 1db09842fa98..1a477ab23284 100644
--- a/pkgs/development/python-modules/pyparted/default.nix
+++ b/pkgs/development/python-modules/pyparted/default.nix
@@ -1,6 +1,5 @@
 { stdenv
 , buildPythonPackage
-, fetchurl
 , isPyPy
 , pkgs
 , python
diff --git a/pkgs/development/python-modules/pyqt/5.x.nix b/pkgs/development/python-modules/pyqt/5.x.nix
index 46de94cd0c68..288f35f23524 100644
--- a/pkgs/development/python-modules/pyqt/5.x.nix
+++ b/pkgs/development/python-modules/pyqt/5.x.nix
@@ -1,4 +1,4 @@
-{ lib, fetchurl, fetchpatch, pythonPackages, pkgconfig
+{ lib, fetchurl, pythonPackages, pkgconfig
 , qmake, lndir, qtbase, qtsvg, qtwebengine, dbus
 , withConnectivity ? false, qtconnectivity
 , withWebKit ? false, qtwebkit
diff --git a/pkgs/development/python-modules/pyreadability/default.nix b/pkgs/development/python-modules/pyreadability/default.nix
index a95074b906e3..60bdbf011674 100644
--- a/pkgs/development/python-modules/pyreadability/default.nix
+++ b/pkgs/development/python-modules/pyreadability/default.nix
@@ -1,6 +1,5 @@
 { lib, fetchPypi, buildPythonPackage
 , requests, chardet, cssselect, lxml
-, pytest
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pytest-ansible/default.nix b/pkgs/development/python-modules/pytest-ansible/default.nix
index e37fa07f2723..3085ee06e870 100644
--- a/pkgs/development/python-modules/pytest-ansible/default.nix
+++ b/pkgs/development/python-modules/pytest-ansible/default.nix
@@ -4,7 +4,6 @@
 , ansible
 , pytest
 , mock
-, isPy3k
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pytest-benchmark/default.nix b/pkgs/development/python-modules/pytest-benchmark/default.nix
index 0a361627e8e9..b43c00e42d9f 100644
--- a/pkgs/development/python-modules/pytest-benchmark/default.nix
+++ b/pkgs/development/python-modules/pytest-benchmark/default.nix
@@ -1,7 +1,6 @@
 { lib
 , buildPythonPackage
 , fetchFromGitHub
-, pytestrunner
 , pytest
 , py-cpuinfo
 , pythonOlder
diff --git a/pkgs/development/python-modules/python-engineio/default.nix b/pkgs/development/python-modules/python-engineio/default.nix
index adb6d71fb40d..93dd9fb654f9 100644
--- a/pkgs/development/python-modules/python-engineio/default.nix
+++ b/pkgs/development/python-modules/python-engineio/default.nix
@@ -1,5 +1,4 @@
 { stdenv
-, lib
 , buildPythonPackage
 , fetchFromGitHub
 , six
diff --git a/pkgs/development/python-modules/python-jenkins/default.nix b/pkgs/development/python-modules/python-jenkins/default.nix
index 44f1c0d6c39d..9cd55757aac7 100644
--- a/pkgs/development/python-modules/python-jenkins/default.nix
+++ b/pkgs/development/python-modules/python-jenkins/default.nix
@@ -1,16 +1,12 @@
 { lib
 , buildPythonPackage
 , fetchPypi
-, python
 , mock
 , pbr
 , pyyaml
 , six
 , multi_key_dict
-, testtools
 , testscenarios
-, testrepository
-, kerberos
 , requests
 , unittest2
 , requests-mock
diff --git a/pkgs/development/python-modules/python-mapnik/default.nix b/pkgs/development/python-modules/python-mapnik/default.nix
index 8523020ccf50..35b7a706f609 100644
--- a/pkgs/development/python-modules/python-mapnik/default.nix
+++ b/pkgs/development/python-modules/python-mapnik/default.nix
@@ -1,6 +1,5 @@
 { stdenv
 , buildPythonPackage
-, fetchFromGitHub
 , isPyPy
 , python
 , pkgs
diff --git a/pkgs/development/python-modules/python-snappy/default.nix b/pkgs/development/python-modules/python-snappy/default.nix
index d3ab69ac9570..328b1ec0994d 100644
--- a/pkgs/development/python-modules/python-snappy/default.nix
+++ b/pkgs/development/python-modules/python-snappy/default.nix
@@ -2,7 +2,6 @@
 , buildPythonPackage
 , fetchPypi
 , isPyPy
-, python
 , snappy
 , cffi
 , nose
diff --git a/pkgs/development/python-modules/pyutil/default.nix b/pkgs/development/python-modules/pyutil/default.nix
index b7c38c512652..ce0c514e3eca 100644
--- a/pkgs/development/python-modules/pyutil/default.nix
+++ b/pkgs/development/python-modules/pyutil/default.nix
@@ -4,7 +4,6 @@
 , setuptoolsDarcs
 , setuptoolsTrial
 , simplejson
-, zbase32
 , twisted
 , isPyPy
 }:
diff --git a/pkgs/development/python-modules/pyuv/default.nix b/pkgs/development/python-modules/pyuv/default.nix
index 04e2c2f08185..cd76b283028f 100644
--- a/pkgs/development/python-modules/pyuv/default.nix
+++ b/pkgs/development/python-modules/pyuv/default.nix
@@ -1,6 +1,5 @@
 { stdenv
 , buildPythonPackage
-, fetchurl
 , isPyPy
 , pkgs
 }:
diff --git a/pkgs/development/python-modules/pywbem/default.nix b/pkgs/development/python-modules/pywbem/default.nix
index 90a415060eb8..83403b3d1500 100644
--- a/pkgs/development/python-modules/pywbem/default.nix
+++ b/pkgs/development/python-modules/pywbem/default.nix
@@ -1,5 +1,5 @@
 { lib, buildPythonPackage, fetchPypi, libxml2
-, m2crypto, ply, pyyaml, six, pbr, pythonOlder, isPy37, python
+, m2crypto, ply, pyyaml, six, pbr, pythonOlder, isPy37
 , httpretty, lxml, mock, pytest, requests, decorator, unittest2
 }:
 
diff --git a/pkgs/development/python-modules/qrcode/default.nix b/pkgs/development/python-modules/qrcode/default.nix
index 363f43c857dd..4321c025b56d 100644
--- a/pkgs/development/python-modules/qrcode/default.nix
+++ b/pkgs/development/python-modules/qrcode/default.nix
@@ -1,6 +1,5 @@
 { stdenv
 , buildPythonPackage
-, isPy27
 , fetchPypi
 , six
 , pillow
diff --git a/pkgs/development/python-modules/requests-aws4auth/default.nix b/pkgs/development/python-modules/requests-aws4auth/default.nix
index b7010eccf0b3..46d1dbdbbd62 100644
--- a/pkgs/development/python-modules/requests-aws4auth/default.nix
+++ b/pkgs/development/python-modules/requests-aws4auth/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildPythonPackage, fetchPypi, fetchzip, isPy3k, requests }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k, requests }:
 with lib;
 buildPythonPackage rec {
   pname = "requests-aws4auth";
diff --git a/pkgs/development/python-modules/restructuredtext_lint/default.nix b/pkgs/development/python-modules/restructuredtext_lint/default.nix
index 4522c7623283..340c558b7a42 100644
--- a/pkgs/development/python-modules/restructuredtext_lint/default.nix
+++ b/pkgs/development/python-modules/restructuredtext_lint/default.nix
@@ -1,7 +1,6 @@
 { lib
 , buildPythonPackage
 , fetchPypi
-, isPy37
 , docutils
 , nose
 , testtools
diff --git a/pkgs/development/python-modules/samplerate/default.nix b/pkgs/development/python-modules/samplerate/default.nix
index 432e2194b098..b5952e6ee156 100644
--- a/pkgs/development/python-modules/samplerate/default.nix
+++ b/pkgs/development/python-modules/samplerate/default.nix
@@ -1,6 +1,5 @@
 { stdenv
 , buildPythonPackage
-, fetchgit
 , numpy
 , pkgs
 }:
diff --git a/pkgs/development/python-modules/scikit-bio/default.nix b/pkgs/development/python-modules/scikit-bio/default.nix
index cc83c31ca5df..c5e36f8ac070 100644
--- a/pkgs/development/python-modules/scikit-bio/default.nix
+++ b/pkgs/development/python-modules/scikit-bio/default.nix
@@ -13,7 +13,6 @@
 , scipy
 , hdmedians
 , scikitlearn
-, pytest
 , coverage
 , python
 , isPy3k
diff --git a/pkgs/development/python-modules/scikitlearn/default.nix b/pkgs/development/python-modules/scikitlearn/default.nix
index 454066c1c163..04ea254ee928 100644
--- a/pkgs/development/python-modules/scikitlearn/default.nix
+++ b/pkgs/development/python-modules/scikitlearn/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, python
+{ stdenv, buildPythonPackage, fetchPypi
 , gfortran, glibcLocales
 , numpy, scipy, pytest, pillow
 }:
diff --git a/pkgs/development/python-modules/scipy/default.nix b/pkgs/development/python-modules/scipy/default.nix
index 01c54ef5f16b..af6dbeaa5e17 100644
--- a/pkgs/development/python-modules/scipy/default.nix
+++ b/pkgs/development/python-modules/scipy/default.nix
@@ -1,4 +1,4 @@
-{lib, fetchPypi, python, buildPythonPackage, gfortran, nose, pytest, numpy, fetchpatch}:
+{lib, fetchPypi, python, buildPythonPackage, gfortran, nose, pytest, numpy}:
 
 buildPythonPackage rec {
   pname = "scipy";
diff --git a/pkgs/development/python-modules/selectors34/default.nix b/pkgs/development/python-modules/selectors34/default.nix
index 76f6232bafa7..079e88378c07 100644
--- a/pkgs/development/python-modules/selectors34/default.nix
+++ b/pkgs/development/python-modules/selectors34/default.nix
@@ -1,7 +1,6 @@
 { stdenv
 , buildPythonPackage
 , fetchPypi
-, lib
 , python
 , six
 }:
diff --git a/pkgs/development/python-modules/simplejson/default.nix b/pkgs/development/python-modules/simplejson/default.nix
index cc60e81a59ee..9e80830f4380 100644
--- a/pkgs/development/python-modules/simplejson/default.nix
+++ b/pkgs/development/python-modules/simplejson/default.nix
@@ -2,7 +2,6 @@
 , buildPythonPackage
 , fetchPypi
 , stdenv
-, isPy3k
 , pytest
 }:
 
diff --git a/pkgs/development/python-modules/sqlalchemy-imageattach/default.nix b/pkgs/development/python-modules/sqlalchemy-imageattach/default.nix
index 53eb223b25a7..96de95655e05 100644
--- a/pkgs/development/python-modules/sqlalchemy-imageattach/default.nix
+++ b/pkgs/development/python-modules/sqlalchemy-imageattach/default.nix
@@ -1,6 +1,5 @@
 { stdenv
 , buildPythonPackage
-, fetchFromGitHub
 , pytest
 , Wand
 , webob
diff --git a/pkgs/development/python-modules/sqlalchemy-migrate/default.nix b/pkgs/development/python-modules/sqlalchemy-migrate/default.nix
index 596f9e47a08d..ba93fb040b9a 100644
--- a/pkgs/development/python-modules/sqlalchemy-migrate/default.nix
+++ b/pkgs/development/python-modules/sqlalchemy-migrate/default.nix
@@ -1,5 +1,5 @@
 { stdenv, buildPythonPackage, fetchPypi, fetchpatch, python
-, unittest2, scripttest, pytz, pylint, mock
+, unittest2, scripttest, pytz, mock
 , testtools, pbr, tempita, decorator, sqlalchemy
 , six, sqlparse, testrepository
 }:
diff --git a/pkgs/development/python-modules/ssdp/default.nix b/pkgs/development/python-modules/ssdp/default.nix
index 36cf33d8c252..82f1315ba3d2 100644
--- a/pkgs/development/python-modules/ssdp/default.nix
+++ b/pkgs/development/python-modules/ssdp/default.nix
@@ -1,7 +1,6 @@
 { stdenv
 , buildPythonPackage
 , fetchPypi
-, pkgs
 , pbr
 , pytest
 }:
diff --git a/pkgs/development/python-modules/structlog/default.nix b/pkgs/development/python-modules/structlog/default.nix
index aa582aacaa94..f7e390bd6788 100644
--- a/pkgs/development/python-modules/structlog/default.nix
+++ b/pkgs/development/python-modules/structlog/default.nix
@@ -1,7 +1,6 @@
 { lib
 , buildPythonPackage
 , fetchPypi
-, fetchpatch
 , pytest
 , python-rapidjson
 , pretend
diff --git a/pkgs/development/python-modules/tensorflow-estimator/default.nix b/pkgs/development/python-modules/tensorflow-estimator/default.nix
index 5b9e032c49a9..3b33ac413ba9 100644
--- a/pkgs/development/python-modules/tensorflow-estimator/default.nix
+++ b/pkgs/development/python-modules/tensorflow-estimator/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchPypi, buildPythonPackage, isPy3k
+{ stdenv, fetchPypi, buildPythonPackage
 , numpy
 , absl-py 
 , mock
diff --git a/pkgs/development/python-modules/tensorflow/bin.nix b/pkgs/development/python-modules/tensorflow/bin.nix
index 03f1e66bf501..e4372fc2ec45 100644
--- a/pkgs/development/python-modules/tensorflow/bin.nix
+++ b/pkgs/development/python-modules/tensorflow/bin.nix
@@ -2,7 +2,7 @@
 , lib
 , fetchurl
 , buildPythonPackage
-, isPy3k, isPy36, pythonOlder
+, isPy3k, pythonOlder
 , astor
 , gast
 , numpy
@@ -13,7 +13,6 @@
 , grpcio
 , mock
 , backports_weakref
-, enum34
 , tensorflow-estimator
 , tensorflow-tensorboard
 , cudaSupport ? false
diff --git a/pkgs/development/python-modules/tflearn/default.nix b/pkgs/development/python-modules/tflearn/default.nix
index 341c1da56801..03185ae4d9fe 100644
--- a/pkgs/development/python-modules/tflearn/default.nix
+++ b/pkgs/development/python-modules/tflearn/default.nix
@@ -1,4 +1,4 @@
-{ lib, fetchPypi, buildPythonPackage, fetchurl, pytest, scipy, h5py
+{ lib, fetchPypi, buildPythonPackage, pytest, scipy, h5py
 , pillow, tensorflow }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/tqdm/default.nix b/pkgs/development/python-modules/tqdm/default.nix
index f224ec21b0e8..cc0745afef41 100644
--- a/pkgs/development/python-modules/tqdm/default.nix
+++ b/pkgs/development/python-modules/tqdm/default.nix
@@ -5,7 +5,6 @@
 , coverage
 , glibcLocales
 , flake8
-, stdenv
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/tweepy/default.nix b/pkgs/development/python-modules/tweepy/default.nix
index 97903a4a222b..3218ff43e279 100644
--- a/pkgs/development/python-modules/tweepy/default.nix
+++ b/pkgs/development/python-modules/tweepy/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildPythonPackage, fetchPypi, fetchpatch, requests, six, requests_oauthlib }:
+{ lib, buildPythonPackage, fetchPypi, requests, six, requests_oauthlib }:
 
 buildPythonPackage rec {
   pname = "tweepy";
diff --git a/pkgs/development/python-modules/unicorn/default.nix b/pkgs/development/python-modules/unicorn/default.nix
index de317ec1844e..35afe10f8d24 100644
--- a/pkgs/development/python-modules/unicorn/default.nix
+++ b/pkgs/development/python-modules/unicorn/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPackages, buildPythonPackage, fetchPypi, isPy3k }:
+{ stdenv, buildPackages, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   name  = "${pname}-${version}";
diff --git a/pkgs/development/python-modules/uuid/default.nix b/pkgs/development/python-modules/uuid/default.nix
index 0481e5c24c0f..5e31f6ccad09 100644
--- a/pkgs/development/python-modules/uuid/default.nix
+++ b/pkgs/development/python-modules/uuid/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "uuid";
diff --git a/pkgs/development/python-modules/vowpalwabbit/default.nix b/pkgs/development/python-modules/vowpalwabbit/default.nix
index e2e305635200..a91de2d7eeed 100644
--- a/pkgs/development/python-modules/vowpalwabbit/default.nix
+++ b/pkgs/development/python-modules/vowpalwabbit/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPythonPackage, fetchPypi, python, boost, zlib, clang
+{ stdenv, lib, buildPythonPackage, fetchPypi, python, zlib, clang
 , ncurses, pytest, docutils, pygments, numpy, scipy, scikitlearn }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/webapp2/default.nix b/pkgs/development/python-modules/webapp2/default.nix
index 91ce52ff5adc..584440eab6ae 100644
--- a/pkgs/development/python-modules/webapp2/default.nix
+++ b/pkgs/development/python-modules/webapp2/default.nix
@@ -3,7 +3,6 @@
 , fetchPypi
 , webob
 , six
-, jinja2
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/weboob/default.nix b/pkgs/development/python-modules/weboob/default.nix
index 26eca0d24cc1..d78cb7f3de9c 100644
--- a/pkgs/development/python-modules/weboob/default.nix
+++ b/pkgs/development/python-modules/weboob/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, fetchurl, fetchPypi, stdenv, isPy27
+{ buildPythonPackage, fetchurl, stdenv, isPy27
 , nose, pillow, prettytable, pyyaml, dateutil, gdata
 , requests, mechanize, feedparser, lxml, gnupg, pyqt5
 , libyaml, simplejson, cssselect, futures, pdfminer
diff --git a/pkgs/development/python-modules/werkzeug/default.nix b/pkgs/development/python-modules/werkzeug/default.nix
index 9b5e3f9ca5f9..cb46e498db7d 100644
--- a/pkgs/development/python-modules/werkzeug/default.nix
+++ b/pkgs/development/python-modules/werkzeug/default.nix
@@ -1,6 +1,6 @@
 { stdenv, buildPythonPackage, fetchPypi
 , itsdangerous, hypothesis
-, pytest, requests, glibcLocales }:
+, pytest, requests }:
 
 buildPythonPackage rec {
   pname = "Werkzeug";
diff --git a/pkgs/development/python-modules/wrf-python/default.nix b/pkgs/development/python-modules/wrf-python/default.nix
index 3adbaa942dd5..8d1443837cde 100644
--- a/pkgs/development/python-modules/wrf-python/default.nix
+++ b/pkgs/development/python-modules/wrf-python/default.nix
@@ -1,4 +1,4 @@
-{lib, fetchFromGitHub, python, pythonOlder, buildPythonPackage, gfortran, mock, xarray, wrapt, numpy, netcdf4}:
+{lib, fetchFromGitHub, pythonOlder, buildPythonPackage, gfortran, mock, xarray, wrapt, numpy, netcdf4}:
 
 buildPythonPackage rec {
   pname = "wrf-python";
diff --git a/pkgs/development/python-modules/xdot/default.nix b/pkgs/development/python-modules/xdot/default.nix
index 8ad249a4c1a4..14f4b24747c7 100644
--- a/pkgs/development/python-modules/xdot/default.nix
+++ b/pkgs/development/python-modules/xdot/default.nix
@@ -1,5 +1,5 @@
 { lib, buildPythonPackage, fetchPypi, isPy3k
-, wrapGAppsHook, gobject-introspection, pygobject3, graphviz, gnome3, gtk3 }:
+, wrapGAppsHook, gobject-introspection, pygobject3, graphviz, gtk3 }:
 
 buildPythonPackage rec {
   pname = "xdot";
diff --git a/pkgs/development/python-modules/xgboost/default.nix b/pkgs/development/python-modules/xgboost/default.nix
index 559789149736..bbe7c9862606 100644
--- a/pkgs/development/python-modules/xgboost/default.nix
+++ b/pkgs/development/python-modules/xgboost/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, buildPythonPackage
+{ buildPythonPackage
 , pytest
 , nose
 , scipy
diff --git a/pkgs/development/python-modules/xnd/default.nix b/pkgs/development/python-modules/xnd/default.nix
index 8ffb8f96936b..558e414debf8 100644
--- a/pkgs/development/python-modules/xnd/default.nix
+++ b/pkgs/development/python-modules/xnd/default.nix
@@ -1,6 +1,4 @@
-{ lib
-, buildPythonPackage
-, fetchFromGitHub
+{ buildPythonPackage
 , ndtypes
 , libndtypes
 , libxnd
diff --git a/pkgs/development/python-modules/yattag/default.nix b/pkgs/development/python-modules/yattag/default.nix
index 5c02ea83ec99..b8a7dc47c10a 100644
--- a/pkgs/development/python-modules/yattag/default.nix
+++ b/pkgs/development/python-modules/yattag/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi }:
+{ lib, buildPythonPackage, fetchPypi }:
 
 buildPythonPackage rec {
   pname = "yattag";
diff --git a/pkgs/development/python-modules/zope_configuration/default.nix b/pkgs/development/python-modules/zope_configuration/default.nix
index 28f461689972..e0ec7bd6ca80 100644
--- a/pkgs/development/python-modules/zope_configuration/default.nix
+++ b/pkgs/development/python-modules/zope_configuration/default.nix
@@ -5,7 +5,6 @@
 , zope_schema
 , zope_testrunner
 , manuel
-, isPy3k
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/zstd/default.nix b/pkgs/development/python-modules/zstd/default.nix
index 3706fd06a15d..08b1d67ffee5 100644
--- a/pkgs/development/python-modules/zstd/default.nix
+++ b/pkgs/development/python-modules/zstd/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, pkgconfig, fetchpatch, fetchPypi, buildPythonPackage
+{ stdenv, pkgconfig, fetchPypi, buildPythonPackage
 , zstd, pytest }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/ruby-modules/bundled-common/test.nix b/pkgs/development/ruby-modules/bundled-common/test.nix
index 7c5932c4e761..ab03f48445b3 100644
--- a/pkgs/development/ruby-modules/bundled-common/test.nix
+++ b/pkgs/development/ruby-modules/bundled-common/test.nix
@@ -1,4 +1,4 @@
-{ stdenv, writeText, lib, ruby, defaultGemConfig, callPackage, test, stubs, should }:
+{ lib, ruby, defaultGemConfig, test, should }:
 let
   testConfigs = {
     inherit lib;
diff --git a/pkgs/development/ruby-modules/bundler-env/test.nix b/pkgs/development/ruby-modules/bundler-env/test.nix
index e42f1bf25711..8fdbafbba425 100644
--- a/pkgs/development/ruby-modules/bundler-env/test.nix
+++ b/pkgs/development/ruby-modules/bundler-env/test.nix
@@ -1,4 +1,4 @@
-{ stdenv, writeText, lib, ruby, defaultGemConfig, callPackage, test, stubs, should}:
+{ callPackage, test, stubs, should}:
 let
   bundlerEnv = callPackage ./default.nix stubs // {
     basicEnv = callPackage ../bundled-common stubs;
diff --git a/pkgs/development/tools/analysis/radare2/default.nix b/pkgs/development/tools/analysis/radare2/default.nix
index 5a3ee3d8cbdd..2bb9f6e5d427 100644
--- a/pkgs/development/tools/analysis/radare2/default.nix
+++ b/pkgs/development/tools/analysis/radare2/default.nix
@@ -1,6 +1,5 @@
 {stdenv, fetchFromGitHub
 , buildPackages
-, callPackage
 , pkgconfig
 , libusb, readline, libewf, perl, zlib, openssl
 , libuv, file, libzip, xxHash
@@ -23,7 +22,7 @@ let
   inherit (stdenv.lib) optional;
 
   generic = {
-    version_commit,
+    version_commit, # unused
     gittap,
     gittip,
     rev,
diff --git a/pkgs/development/tools/analysis/valgrind/default.nix b/pkgs/development/tools/analysis/valgrind/default.nix
index 4def201952a9..c362ae5734cb 100644
--- a/pkgs/development/tools/analysis/valgrind/default.nix
+++ b/pkgs/development/tools/analysis/valgrind/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, perl, gdb, llvm, cctools, xnu, bootstrap_cmds }:
+{ stdenv, fetchurl, perl, gdb, cctools, xnu, bootstrap_cmds }:
 
 stdenv.mkDerivation rec {
   name = "valgrind-3.15.0";
diff --git a/pkgs/development/tools/aws-sam-cli/default.nix b/pkgs/development/tools/aws-sam-cli/default.nix
index c4095a6f9b3c..73adfaec8386 100644
--- a/pkgs/development/tools/aws-sam-cli/default.nix
+++ b/pkgs/development/tools/aws-sam-cli/default.nix
@@ -1,6 +1,5 @@
 { lib
 , python
-, fetchFromGitHub
 }:
 
 let
diff --git a/pkgs/development/tools/bazel-watcher/default.nix b/pkgs/development/tools/bazel-watcher/default.nix
index 1a56933548f6..035bc16064d5 100644
--- a/pkgs/development/tools/bazel-watcher/default.nix
+++ b/pkgs/development/tools/bazel-watcher/default.nix
@@ -1,7 +1,5 @@
 { buildBazelPackage
-, cacert
 , fetchFromGitHub
-, fetchpatch
 , git
 , go
 , python
diff --git a/pkgs/development/tools/build-managers/alibuild/default.nix b/pkgs/development/tools/build-managers/alibuild/default.nix
index 68f00be342c3..c50e57160639 100644
--- a/pkgs/development/tools/build-managers/alibuild/default.nix
+++ b/pkgs/development/tools/build-managers/alibuild/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, python}:
+{ lib, python}:
 
 python.pkgs.buildPythonApplication rec {
   pname = "alibuild";
diff --git a/pkgs/development/tools/build-managers/bazel/bash-tools-test.nix b/pkgs/development/tools/build-managers/bazel/bash-tools-test.nix
index fa6b310ce618..898640a84fe6 100644
--- a/pkgs/development/tools/build-managers/bazel/bash-tools-test.nix
+++ b/pkgs/development/tools/build-managers/bazel/bash-tools-test.nix
@@ -1,4 +1,4 @@
-{ stdenv, writeText, runCommandCC, bazel, runLocal, bazelTest }:
+{ writeText, bazel, runLocal, bazelTest }:
 
 # Tests that certain executables are available in bazel-executed bash shells.
 
diff --git a/pkgs/development/tools/build-managers/bazel/bazel-remote/default.nix b/pkgs/development/tools/build-managers/bazel/bazel-remote/default.nix
index dbbc0d11ff1a..0d821fa61660 100644
--- a/pkgs/development/tools/build-managers/bazel/bazel-remote/default.nix
+++ b/pkgs/development/tools/build-managers/bazel/bazel-remote/default.nix
@@ -1,7 +1,6 @@
 { buildBazelPackage
 , cacert
 , fetchFromGitHub
-, fetchpatch
 , git
 , go
 , stdenv
diff --git a/pkgs/development/tools/build-managers/bazel/default.nix b/pkgs/development/tools/build-managers/bazel/default.nix
index 1ea0fc049ba8..7fa4118e34e8 100644
--- a/pkgs/development/tools/build-managers/bazel/default.nix
+++ b/pkgs/development/tools/build-managers/bazel/default.nix
@@ -1,10 +1,10 @@
-{ stdenv, callPackage, lib, fetchurl, fetchpatch, runCommand, runCommandCC, makeWrapper
+{ stdenv, callPackage, lib, fetchurl, runCommand, runCommandCC, makeWrapper
 # this package (through the fixpoint glass)
 , bazel
 , lr, xe, zip, unzip, bash, writeCBin, coreutils
-, which, python, perl, gawk, gnused, gnutar, gnugrep, gzip, findutils
+, which, python, gawk, gnused, gnutar, gnugrep, gzip, findutils
 # Apple dependencies
-, cctools, clang, libcxx, CoreFoundation, CoreServices, Foundation
+, cctools, libcxx, CoreFoundation, CoreServices, Foundation
 # Allow to independently override the jdks used to build and run respectively
 , buildJdk, runJdk
 , buildJdkName
diff --git a/pkgs/development/tools/build-managers/bazel/python-bin-path-test.nix b/pkgs/development/tools/build-managers/bazel/python-bin-path-test.nix
index 08bc642b6307..17d5697a81ea 100644
--- a/pkgs/development/tools/build-managers/bazel/python-bin-path-test.nix
+++ b/pkgs/development/tools/build-managers/bazel/python-bin-path-test.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, writeText, bazel, bazelTest, runLocal }:
+{ writeText, bazel, bazelTest, runLocal }:
 
 let
   WORKSPACE = writeText "WORKSPACE" ''
diff --git a/pkgs/development/tools/build-managers/cmake/default.nix b/pkgs/development/tools/build-managers/cmake/default.nix
index 721015f0c7c4..290860a0d9c3 100644
--- a/pkgs/development/tools/build-managers/cmake/default.nix
+++ b/pkgs/development/tools/build-managers/cmake/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, pkgconfig
+{ stdenv, fetchurl, pkgconfig
 , bzip2, curl, expat, libarchive, xz, zlib, libuv, rhash
 , buildPackages
 # darwin attributes
diff --git a/pkgs/development/tools/build-managers/gn/default.nix b/pkgs/development/tools/build-managers/gn/default.nix
index 7ee4c4ee2580..d89c5fdbabde 100644
--- a/pkgs/development/tools/build-managers/gn/default.nix
+++ b/pkgs/development/tools/build-managers/gn/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchgit, fetchzip, fetchpatch, darwin, writeText
+{ stdenv, lib, fetchgit, darwin, writeText
 , git, ninja, python2 }:
 
 let
diff --git a/pkgs/development/tools/clang-tools/default.nix b/pkgs/development/tools/clang-tools/default.nix
index 42bcf7fd055f..bd8401ac80dd 100644
--- a/pkgs/development/tools/clang-tools/default.nix
+++ b/pkgs/development/tools/clang-tools/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, writeScript, llvmPackages }:
+{ stdenv, llvmPackages }:
 
 let
   clang = llvmPackages.clang-unwrapped;
diff --git a/pkgs/development/tools/cloudfoundry-cli/default.nix b/pkgs/development/tools/cloudfoundry-cli/default.nix
index 4f285fa69618..70d0acfec884 100644
--- a/pkgs/development/tools/cloudfoundry-cli/default.nix
+++ b/pkgs/development/tools/cloudfoundry-cli/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildGoPackage, fetchFromGitHub, go }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "cloudfoundry-cli-${version}";
diff --git a/pkgs/development/tools/cppclean/default.nix b/pkgs/development/tools/cppclean/default.nix
index 96fe07a7799a..99f8d55bd87e 100644
--- a/pkgs/development/tools/cppclean/default.nix
+++ b/pkgs/development/tools/cppclean/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, python3Packages }:
+{ stdenv, fetchFromGitHub, python3Packages }:
 
 with python3Packages;
 
diff --git a/pkgs/development/tools/dapper/default.nix b/pkgs/development/tools/dapper/default.nix
index 265763492b88..d5c7d309e98d 100644
--- a/pkgs/development/tools/dapper/default.nix
+++ b/pkgs/development/tools/dapper/default.nix
@@ -1,7 +1,6 @@
 { buildGoPackage
 , lib
 , fetchFromGitHub
-, fetchpatch
 }:
 
 buildGoPackage rec {
diff --git a/pkgs/development/tools/database/cdb/default.nix b/pkgs/development/tools/database/cdb/default.nix
index f0a4f6c34e25..553d622a83c6 100644
--- a/pkgs/development/tools/database/cdb/default.nix
+++ b/pkgs/development/tools/database/cdb/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, fetchFromGitHub, writeText }:
+{ stdenv, lib, fetchurl, fetchFromGitHub }:
 
 let
   version = "0.75";
diff --git a/pkgs/development/tools/database/dbmate/default.nix b/pkgs/development/tools/database/dbmate/default.nix
index 14fcc3f8607c..7eb34aa29ba4 100644
--- a/pkgs/development/tools/database/dbmate/default.nix
+++ b/pkgs/development/tools/database/dbmate/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "dbmate-${version}";
diff --git a/pkgs/development/tools/database/pgcli/default.nix b/pkgs/development/tools/database/pgcli/default.nix
index 602eb33fdc1c..31ffff3804f0 100644
--- a/pkgs/development/tools/database/pgcli/default.nix
+++ b/pkgs/development/tools/database/pgcli/default.nix
@@ -1,4 +1,4 @@
-{ lib, python3Packages, fetchFromGitHub, fetchpatch }:
+{ lib, python3Packages, fetchpatch }:
 
 python3Packages.buildPythonApplication rec {
   pname = "pgcli";
diff --git a/pkgs/development/tools/erlang/cuter/default.nix b/pkgs/development/tools/erlang/cuter/default.nix
index af58762f80eb..e67b417226f4 100644
--- a/pkgs/development/tools/erlang/cuter/default.nix
+++ b/pkgs/development/tools/erlang/cuter/default.nix
@@ -1,5 +1,5 @@
 { stdenv, autoreconfHook, which, writeText, makeWrapper, fetchFromGitHub, erlang
-, beamPackages, z3, python }:
+, z3, python }:
 
 stdenv.mkDerivation rec {
   name = "cuter-${version}";
diff --git a/pkgs/development/tools/erlang/relx-exe/default.nix b/pkgs/development/tools/erlang/relx-exe/default.nix
index 2c32cc5c6706..78735d8f76fc 100644
--- a/pkgs/development/tools/erlang/relx-exe/default.nix
+++ b/pkgs/development/tools/erlang/relx-exe/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchHex, fetchRebar3Deps, rebar3Relx }:
+{ fetchHex, fetchRebar3Deps, rebar3Relx }:
 
 rebar3Relx rec {
   name = "relx-exe";
diff --git a/pkgs/development/tools/fusee-launcher/default.nix b/pkgs/development/tools/fusee-launcher/default.nix
index 6210361eb883..292c0dc3a4e8 100644
--- a/pkgs/development/tools/fusee-launcher/default.nix
+++ b/pkgs/development/tools/fusee-launcher/default.nix
@@ -1,5 +1,4 @@
 { stdenv
-, lib
 , python3Packages
 , python3
 , fetchFromGitHub
diff --git a/pkgs/development/tools/github-changelog-generator/default.nix b/pkgs/development/tools/github-changelog-generator/default.nix
index 9362ef3fe45d..02de300138d2 100644
--- a/pkgs/development/tools/github-changelog-generator/default.nix
+++ b/pkgs/development/tools/github-changelog-generator/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, bundlerApp}:
+{ lib, bundlerApp}:
 
 bundlerApp rec {
   pname = "github_changelog_generator";
diff --git a/pkgs/development/tools/global-platform-pro/default.nix b/pkgs/development/tools/global-platform-pro/default.nix
index 9841e7900cd5..361740def118 100644
--- a/pkgs/development/tools/global-platform-pro/default.nix
+++ b/pkgs/development/tools/global-platform-pro/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, jdk, maven, writeText, makeWrapper, jre_headless, pcsclite }:
+{ stdenv, fetchFromGitHub, jdk, maven, makeWrapper, jre_headless, pcsclite }:
 
 # TODO: This is quite a bit of duplicated logic with gephi. Factor it out?
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/tools/jq/default.nix b/pkgs/development/tools/jq/default.nix
index 307968a68440..ebb875c92984 100644
--- a/pkgs/development/tools/jq/default.nix
+++ b/pkgs/development/tools/jq/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, oniguruma }:
+{ stdenv, fetchurl, oniguruma }:
 
 stdenv.mkDerivation rec {
   name = "jq-${version}";
diff --git a/pkgs/development/tools/kubicorn/default.nix b/pkgs/development/tools/kubicorn/default.nix
index fb76aed7b9eb..a63de5507479 100644
--- a/pkgs/development/tools/kubicorn/default.nix
+++ b/pkgs/development/tools/kubicorn/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildGoPackage, fetchFromGitHub }:
+{ stdenv, buildGoPackage, fetchFromGitHub }:
 
 with stdenv.lib;
 
diff --git a/pkgs/development/tools/kustomize/default.nix b/pkgs/development/tools/kustomize/default.nix
index 49cea5e8ac81..69f246e921b5 100644
--- a/pkgs/development/tools/kustomize/default.nix
+++ b/pkgs/development/tools/kustomize/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildGoPackage, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   name = "kustomize-${version}";
diff --git a/pkgs/development/tools/kythe/default.nix b/pkgs/development/tools/kythe/default.nix
index aaad6d31210c..c2bba7b32542 100644
--- a/pkgs/development/tools/kythe/default.nix
+++ b/pkgs/development/tools/kythe/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, binutils , fetchurl, glibc, ncurses5 }:
+{ stdenv, binutils , fetchurl, ncurses5 }:
 
 stdenv.mkDerivation rec {
   version = "0.0.30";
diff --git a/pkgs/development/tools/misc/binutils/default.nix b/pkgs/development/tools/misc/binutils/default.nix
index 1edd2944eab9..c33741740adc 100644
--- a/pkgs/development/tools/misc/binutils/default.nix
+++ b/pkgs/development/tools/misc/binutils/default.nix
@@ -6,7 +6,6 @@
 , noSysDirs
 , gold ? !stdenv.buildPlatform.isDarwin || stdenv.hostPlatform == stdenv.targetPlatform
 , bison ? null
-, fetchpatch
 }:
 
 let
diff --git a/pkgs/development/tools/misc/gdb/default.nix b/pkgs/development/tools/misc/gdb/default.nix
index 05e0b1cd96f6..e37824d241cc 100644
--- a/pkgs/development/tools/misc/gdb/default.nix
+++ b/pkgs/development/tools/misc/gdb/default.nix
@@ -1,7 +1,7 @@
 { stdenv
 
 # Build time
-, fetchurl, fetchpatch, pkgconfig, perl, texinfo, setupDebugInfoDirs, buildPackages
+, fetchurl, pkgconfig, perl, texinfo, setupDebugInfoDirs, buildPackages
 
 # Run time
 , ncurses, readline, gmp, mpfr, expat, zlib, dejagnu
diff --git a/pkgs/development/tools/misc/gdbgui/default.nix b/pkgs/development/tools/misc/gdbgui/default.nix
index 36e83564346b..b021a3e222b3 100644
--- a/pkgs/development/tools/misc/gdbgui/default.nix
+++ b/pkgs/development/tools/misc/gdbgui/default.nix
@@ -2,15 +2,12 @@
 , buildPythonApplication
 , fetchPypi
 , gdb
-, iana-etc
-, libredirect
 , flask
 , flask-socketio
 , flask-compress
 , pygdbmi
 , pygments
 , gevent
-, breakpointHook
 , }:
 
 buildPythonApplication rec {
diff --git a/pkgs/development/tools/misc/kibana/6.x.nix b/pkgs/development/tools/misc/kibana/6.x.nix
index e11dd5040b09..0d052f340958 100644
--- a/pkgs/development/tools/misc/kibana/6.x.nix
+++ b/pkgs/development/tools/misc/kibana/6.x.nix
@@ -2,7 +2,6 @@
 , enableUnfree ? true
 , stdenv
 , makeWrapper
-, fetchzip
 , fetchurl
 , nodejs-10_x
 , coreutils
diff --git a/pkgs/development/tools/misc/kibana/7.x.nix b/pkgs/development/tools/misc/kibana/7.x.nix
index 0c3dd9f12c28..e8435549f4aa 100644
--- a/pkgs/development/tools/misc/kibana/7.x.nix
+++ b/pkgs/development/tools/misc/kibana/7.x.nix
@@ -2,7 +2,6 @@
 , enableUnfree ? true
 , stdenv
 , makeWrapper
-, fetchzip
 , fetchurl
 , nodejs-10_x
 , coreutils
diff --git a/pkgs/development/tools/misc/swig/2.x.nix b/pkgs/development/tools/misc/swig/2.x.nix
index 9f0e767c3d0b..80cfdc8b196d 100644
--- a/pkgs/development/tools/misc/swig/2.x.nix
+++ b/pkgs/development/tools/misc/swig/2.x.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, autoconf, automake, libtool, bison, pcre }:
+{ stdenv, fetchFromGitHub, autoconf, automake, libtool, bison, pcre }:
 
 stdenv.mkDerivation rec {
   pname = "swig";
diff --git a/pkgs/development/tools/misc/swig/3.x.nix b/pkgs/development/tools/misc/swig/3.x.nix
index bec855f3cee6..262afe4f1891 100644
--- a/pkgs/development/tools/misc/swig/3.x.nix
+++ b/pkgs/development/tools/misc/swig/3.x.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, autoconf, automake, libtool, bison, pcre, buildPackages }:
+{ stdenv, fetchFromGitHub, autoconf, automake, libtool, bison, pcre }:
 
 stdenv.mkDerivation rec {
   pname = "swig";
diff --git a/pkgs/development/tools/misc/teensy-loader-cli/default.nix b/pkgs/development/tools/misc/teensy-loader-cli/default.nix
index 91f2a5c58fc2..82d0ec6119ea 100644
--- a/pkgs/development/tools/misc/teensy-loader-cli/default.nix
+++ b/pkgs/development/tools/misc/teensy-loader-cli/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, unzip, libusb, fetchgit }:
+{ stdenv, libusb, fetchgit }:
 let
   version = "2.1";
 in
diff --git a/pkgs/development/tools/packet/default.nix b/pkgs/development/tools/packet/default.nix
index 4c30d000ce20..82849be40b2c 100644
--- a/pkgs/development/tools/packet/default.nix
+++ b/pkgs/development/tools/packet/default.nix
@@ -1,5 +1,5 @@
 # This file was generated by https://github.com/kamilchm/go2nix v1.2.1
-{ stdenv, buildGoPackage, fetchgit, fetchhg, fetchbzr, fetchsvn }:
+{ stdenv, buildGoPackage, fetchgit }:
 
 buildGoPackage rec {
   name = "packet-${version}";
diff --git a/pkgs/development/tools/remarshal/default.nix b/pkgs/development/tools/remarshal/default.nix
index 10bfd0c2f2d0..460fb46671ff 100644
--- a/pkgs/development/tools/remarshal/default.nix
+++ b/pkgs/development/tools/remarshal/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, python3Packages, fetchFromGitHub }:
+{ stdenv, python3Packages }:
 
 python3Packages.buildPythonApplication rec {
   pname = "remarshal";
diff --git a/pkgs/development/tools/simavr/default.nix b/pkgs/development/tools/simavr/default.nix
index f2bbbef71896..04076a8f0cf6 100644
--- a/pkgs/development/tools/simavr/default.nix
+++ b/pkgs/development/tools/simavr/default.nix
@@ -1,5 +1,5 @@
-{ stdenv, fetchFromGitHub, libelf, which, git, pkgconfig, freeglut
-, avrbinutils, avrgcc, avrlibc
+{ stdenv, fetchFromGitHub, libelf, which, pkgconfig, freeglut
+, avrgcc, avrlibc
 , libGLU_combined
 , GLUT }:
 
diff --git a/pkgs/development/tools/solarus-quest-editor/default.nix b/pkgs/development/tools/solarus-quest-editor/default.nix
index 991edf9b568f..35ba9f8c006b 100644
--- a/pkgs/development/tools/solarus-quest-editor/default.nix
+++ b/pkgs/development/tools/solarus-quest-editor/default.nix
@@ -1,7 +1,7 @@
 { stdenv, fetchFromGitLab, cmake, luajit,
   SDL2, SDL2_image, SDL2_ttf, physfs,
   openal, libmodplug, libvorbis, solarus,
-  qtbase, qttools, fetchpatch, glm }:
+  qtbase, qttools, glm }:
 
 stdenv.mkDerivation rec {
   name = "solarus-quest-editor-${version}";
diff --git a/pkgs/development/tools/sourcetrail/default.nix b/pkgs/development/tools/sourcetrail/default.nix
index 42042b87198d..4c5b1843229b 100644
--- a/pkgs/development/tools/sourcetrail/default.nix
+++ b/pkgs/development/tools/sourcetrail/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, autoPatchelfHook
-, icu, zlib, expat, dbus, libheimdal, openssl}:
+, zlib, expat, dbus, openssl}:
 
 stdenv.mkDerivation rec {
   name = "sourcetrail-${version}";
diff --git a/pkgs/development/tools/vulkan-validation-layers/default.nix b/pkgs/development/tools/vulkan-validation-layers/default.nix
index 702b7a564b22..5acf5ed0d231 100644
--- a/pkgs/development/tools/vulkan-validation-layers/default.nix
+++ b/pkgs/development/tools/vulkan-validation-layers/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, fetchFromGitHub, cmake, writeText, python3
+{ stdenv, fetchFromGitHub, cmake, writeText, python3
 , vulkan-headers, vulkan-loader, glslang
 , pkgconfig, xlibsWrapper, libxcb, libXrandr, wayland }:
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/tools/wp-cli/default.nix b/pkgs/development/tools/wp-cli/default.nix
index 211f71693976..c6c001143a95 100644
--- a/pkgs/development/tools/wp-cli/default.nix
+++ b/pkgs/development/tools/wp-cli/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, writeScript, writeText, php, runtimeShell }:
+{ stdenv, lib, fetchurl, php, runtimeShell }:
 
 let
   version = "2.0.1";
diff --git a/pkgs/development/tools/xcbuild/sdks.nix b/pkgs/development/tools/xcbuild/sdks.nix
index 74192d9c6744..5ff3ca6808dc 100644
--- a/pkgs/development/tools/xcbuild/sdks.nix
+++ b/pkgs/development/tools/xcbuild/sdks.nix
@@ -1,5 +1,5 @@
-{ stdenv, runCommand, lib, toolchainName, sdkName
-, writeText, version, xcodePlatform, libcxx, symlinkJoin }:
+{ runCommand, lib, toolchainName, sdkName
+, writeText, version, xcodePlatform }:
 
 let
   inherit (lib.generators) toPlist;
diff --git a/pkgs/development/tools/xcbuild/wrapper.nix b/pkgs/development/tools/xcbuild/wrapper.nix
index bc49a48778fc..cd7b86163667 100644
--- a/pkgs/development/tools/xcbuild/wrapper.nix
+++ b/pkgs/development/tools/xcbuild/wrapper.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, buildPackages, makeWrapper, writeText, runCommand
+{ stdenv, makeWrapper, writeText, runCommand
 , CoreServices, ImageIO, CoreGraphics
 , runtimeShell, callPackage
 , xcodePlatform ? stdenv.targetPlatform.xcodePlatform or "MacOSX"
diff --git a/pkgs/development/web/nodejs/update.nix b/pkgs/development/web/nodejs/update.nix
index 7b5a4710aa09..47e1abc9b217 100644
--- a/pkgs/development/web/nodejs/update.nix
+++ b/pkgs/development/web/nodejs/update.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , writeScript
 , coreutils
 , curl
diff --git a/pkgs/development/web/nodejs/v10.nix b/pkgs/development/web/nodejs/v10.nix
index fd0196961441..5743868d5d96 100644
--- a/pkgs/development/web/nodejs/v10.nix
+++ b/pkgs/development/web/nodejs/v10.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, lib, openssl, enableNpm ? true }:
+{ callPackage, openssl, enableNpm ? true }:
 
 let
   buildNodejs = callPackage ./nodejs.nix { inherit openssl; };
diff --git a/pkgs/development/web/nodejs/v11.nix b/pkgs/development/web/nodejs/v11.nix
index 881c348a98a5..7b60a3772d3c 100644
--- a/pkgs/development/web/nodejs/v11.nix
+++ b/pkgs/development/web/nodejs/v11.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, lib, openssl, enableNpm ? true }:
+{ callPackage, openssl, enableNpm ? true }:
 
 let
   buildNodejs = callPackage ./nodejs.nix { inherit openssl; };
diff --git a/pkgs/development/web/nodejs/v12.nix b/pkgs/development/web/nodejs/v12.nix
index 1e68714f8c14..1ad8b3206d20 100644
--- a/pkgs/development/web/nodejs/v12.nix
+++ b/pkgs/development/web/nodejs/v12.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, lib, openssl, icu, enableNpm ? true }:
+{ callPackage, openssl, icu, enableNpm ? true }:
 
 let
   buildNodejs = callPackage ./nodejs.nix { inherit openssl icu; };
diff --git a/pkgs/development/web/nodejs/v8.nix b/pkgs/development/web/nodejs/v8.nix
index cf877521144a..90d88215d3fd 100644
--- a/pkgs/development/web/nodejs/v8.nix
+++ b/pkgs/development/web/nodejs/v8.nix
@@ -1,4 +1,4 @@
-{ stdenv, callPackage, lib, enableNpm ? true }:
+{ callPackage, enableNpm ? true }:
 
 let
   buildNodejs = callPackage ./nodejs.nix {};
author	volth <volth@volth.com>	2019-06-16 19:59:06 +0000
committer	Alyssa Ross <hi@alyssa.is>	2019-06-16 19:59:05 +0000
commit	f3282c8d1e0ce6ba5d9f6aeddcfad51d879c7a4a (patch)
tree	fc248141d976626274065a36839f64bd2dd3db99 /pkgs/development
parent	ccee4117be08f0474640e06f76a7881389fb7b47 (diff)