diff --git a/pkgs/applications/audio/calf/default.nix b/pkgs/applications/audio/calf/default.nix
index fb697678ba21..bc7b3c57e60b 100644
--- a/pkgs/applications/audio/calf/default.nix
+++ b/pkgs/applications/audio/calf/default.nix
@@ -1,5 +1,5 @@
-{ stdenv, fetchurl, cairo, expat, fftwSinglePrec, fluidsynth, glib, gtk, jackaudio, ladspaH
-, libglade, lv2, pkgconfig }:
+{ stdenv, fetchurl, cairo, expat, fftwSinglePrec, fluidsynth, glib
+, gtk, jackaudio, ladspaH , libglade, lv2, pkgconfig }:
 
 stdenv.mkDerivation rec {
   name = "calf-${version}";
@@ -10,13 +10,16 @@ stdenv.mkDerivation rec {
     sha256 = "0515pzc7ishrq0j5hza83s0yp3x34r977h776lpky389whcyf45j";
   };
 
-  buildInputs =
-    [ cairo jackaudio fftwSinglePrec fluidsynth gtk glib expat libglade ladspaH lv2 pkgconfig ];
+  buildInputs = [ 
+    cairo expat fftwSinglePrec fluidsynth glib gtk jackaudio ladspaH
+    libglade lv2 pkgconfig
+  ];
 
   meta = with stdenv.lib; {
     homepage = http://calf.sourceforge.net;
     description = "A set of high quality open source audio plugins for musicians";
     license = licenses.lgpl2;
     maintainers = [ maintainers.goibhniu ];
+    platforms = platforms.linux;
   };
 }