anchor.diff:  
     buildInputs =
     [ imagemagick ffmpeg_3 swig python3 unittest-cpp
  -    cppzmq zeromq qtbase qtmultimedia ];
  +    cppzmq zeromq qtbase qtmultimedia ]
  +    ++ optional stdenv.isDarwin llvmPackages.openmp
  +  ;
   
     LIBOPENSHOT_AUDIO_DIR = libopenshot-audio;
     "UNITTEST++_INCLUDE_DIR" = "${unittest-cpp}/include/UnitTest++";
  
positive.code:     '';
      license = with licenses; gpl3Plus;
      maintainers = with maintainers; [ AndersonTorres ];
      platforms = with platforms; linux;
    };
  }
  
negative.code: , libopenshot-audio, imagemagick, ffmpeg_3
  , swig, python3
  , unittest-cpp, cppzmq, zeromq
  , qtbase, qtmultimedia
  , llvmPackages
  }:
  
  with stdenv.lib;
  stdenv.mkDerivation rec {
  