1 files changed, 27 insertions, 2 deletions
diff --git a/nixpkgs/pkgs/build-support/src-only/default.nix b/nixpkgs/pkgs/build-support/src-only/default.nix
index c2f7cfb9399..c721fdf40c6 100644
--- a/nixpkgs/pkgs/build-support/src-only/default.nix
+++ b/nixpkgs/pkgs/build-support/src-only/default.nix
@@ -1,6 +1,31 @@
-{ stdenv, name, src, patches ? [], buildInputs ? [] }:
+{ stdenv }@orig:
+# srcOnly is a utility builder that only fetches and unpacks the given `src`,
+# maybe pathings it in the process with the optional `patches` and
+# `buildInputs` attributes.
+#
+# It can be invoked directly, or be used to wrap an existing derivation. Eg:
+#
+# > srcOnly pkgs.hello
+#
+{ name
+, src
+, stdenv ? orig.stdenv
+, patches ? []
+, # deprecated, use the nativeBuildInputs
+  buildInputs ? []
+, # used to pass extra unpackers
+  nativeBuildInputs ? []
+, # needed when passing an existing derivation
+  ...
+}:
 stdenv.mkDerivation {
-  inherit src buildInputs patches name;
+  inherit
+    buildInputs
+    name
+    nativeBuildInputs
+    patches
+    src
+    ;
   installPhase = "cp -r . $out";
   phases = ["unpackPhase" "patchPhase" "installPhase"];
 }