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-rw-r--r--pkgs/tools/graphics/optipng/default.nix5
1 files changed, 2 insertions, 3 deletions
diff --git a/pkgs/tools/graphics/optipng/default.nix b/pkgs/tools/graphics/optipng/default.nix
index fd0b0caea4ca..bc849b21117f 100644
--- a/pkgs/tools/graphics/optipng/default.nix
+++ b/pkgs/tools/graphics/optipng/default.nix
@@ -1,5 +1,4 @@
 { stdenv, fetchurl, libpng, static ? false
-, buildPlatform, hostPlatform
 }:
 
 # This package comes with its own copy of zlib, libpng and pngxtern
@@ -26,11 +25,11 @@ stdenv.mkDerivation rec {
   configureFlags = [
     "--with-system-zlib"
     "--with-system-libpng"
-  ] ++ stdenv.lib.optionals (hostPlatform != buildPlatform) [
+  ] ++ stdenv.lib.optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
     #"-prefix=$out"
   ];
 
-  postInstall = if hostPlatform != buildPlatform && hostPlatform.isWindows then ''
+  postInstall = if stdenv.hostPlatform != stdenv.buildPlatform && stdenv.hostPlatform.isWindows then ''
     mv "$out"/bin/optipng{,.exe}
   '' else null;