anchor.diff:    optional = stdenv.lib.optional;
   in stdenv.mkDerivation rec {
     name = "obs-studio-${version}";
  -  version = "20.0.1";
  +  version = "20.1.0";
   
     src = fetchFromGitHub {
       owner = "jp9000";
       repo = "obs-studio";
       rev = "${version}";
  -    sha256 = "1f701rh4w88ba48b50y16fvmzzsyv4y5nv30mrx3pb2ni7wyanld";
  +    sha256 = "1366nl301rhz8cfbq89ixiq1hdxdn8iimz9xyln274anghz02sbr";
     };
   
     patches = [ ./find-xcb.patch ];
  
positive.code: , fdk_aac
  , ffmpeg
  , jansson
  , libxkbcommon
  , libpthreadstubs
  , libXdmcp
  , qtbase
  , qtx11extras
  , libv4l
  , x264
  , curl
  , xorg
  , makeWrapper
  , pkgconfig
  
  , alsaSupport ? false
  , alsaLib
  
negative.code:                   fdk_aac
                    ffmpeg
                    jansson
                    libjack2
                    libv4l
                    libxkbcommon
                    libpthreadstubs
                    libXdmcp
                    qtbase
                    qtx11extras
                    speex
                    x264
                    vlc
                    makeWrapper
                  ]
                  ++ optional alsaSupport alsaLib
  