1 files changed, 22 insertions, 3 deletions
diff --git a/nixpkgs/pkgs/applications/audio/helm/default.nix b/nixpkgs/pkgs/applications/audio/helm/default.nix
index 8459967a363..145ba68b08b 100644
--- a/nixpkgs/pkgs/applications/audio/helm/default.nix
+++ b/nixpkgs/pkgs/applications/audio/helm/default.nix
@@ -1,5 +1,16 @@
-{ stdenv, fetchFromGitHub , xorg, freetype, alsaLib, curl, libjack2
-, lv2, pkgconfig, libGLU, libGL }:
+{ stdenv
+, fetchFromGitHub
+, fetchpatch
+, xorg
+, freetype
+, alsaLib
+, curl
+, libjack2
+, lv2
+, pkgconfig
+, libGLU
+, libGL
+}:
 
   stdenv.mkDerivation {
   version = "0.9.0";
@@ -20,7 +31,15 @@
 
   CXXFLAGS = "-DHAVE_LROUND";
 
-  patchPhase = ''
+  patches = [
+    # gcc9 compatibility https://github.com/mtytel/helm/pull/233
+    (fetchpatch {
+      url = "https://github.com/mtytel/helm/commit/cb611a80bd5a36d31bfc31212ebbf79aa86c6f08.patch";
+      sha256 = "1i2289srcfz17c3zzab6f51aznzdj62kk53l4afr32bkjh9s4ixk";
+    })
+  ];
+
+  prePatch = ''
     sed -i 's|usr/||g' Makefile
   '';