anchor.diff:    };
   
     buildInputs = [ ffmpeg qt4 ];
  +  nativeBuildInputs = [ qmake4Hook ];
   
     postPatch = stdenv.lib.optionalString (ffmpeg != null) ''
     substituteInPlace converter_ffmpeg.cpp \
  
positive.code: { stdenv, fetchurl, makeDesktopItem, ffmpeg, qt4 }:
  
  stdenv.mkDerivation rec {
    name = "clipgrab-${version}";
  
negative.code:     --replace '"ffmpeg ' '"${ffmpeg.bin}/bin/ffmpeg '
    '';
  
    qmakeFlags = [ "clipgrab.pro" ];
  
    enableParallelBuilding = true;
  
  