1 files changed, 4 insertions, 3 deletions
diff --git a/nixpkgs/pkgs/tools/graphics/pfstools/default.nix b/nixpkgs/pkgs/tools/graphics/pfstools/default.nix
index 99b9e3e0e487..a81321204757 100644
--- a/nixpkgs/pkgs/tools/graphics/pfstools/default.nix
+++ b/nixpkgs/pkgs/tools/graphics/pfstools/default.nix
@@ -1,6 +1,7 @@
 { lib, stdenv, mkDerivation, fetchurl, cmake, pkg-config, darwin
 , openexr, zlib, imagemagick6, libGLU, libGL, freeglut, fftwFloat
-, fftw, gsl, libexif, perl, opencv2, qtbase, netpbm
+, fftw, gsl, libexif, perl, qtbase, netpbm
+, enableUnfree ? false, opencv2
 }:
 
 mkDerivation rec {
@@ -28,12 +29,12 @@ mkDerivation rec {
   nativeBuildInputs = [ cmake pkg-config ];
   buildInputs = [
     openexr zlib imagemagick6 fftwFloat
-    fftw gsl libexif perl opencv2 qtbase netpbm
+    fftw gsl libexif perl qtbase netpbm
   ] ++ (if stdenv.isDarwin then (with darwin.apple_sdk.frameworks; [
     OpenGL GLUT
   ]) else [
     libGLU libGL freeglut
-  ]);
+  ]) ++ lib.optional enableUnfree (opencv2.override { enableUnfree = true; });
 
   patches = [ ./threads.patch ./pfstools.patch ./pfsalign.patch ];