anchor.diff:      cmake
       ffmpeg
       gettext
  -    libpng
  -    libpthreadstubs
  -    libXdmcp
  -    libxshmfence
  +    gtk2-x11
       mesa
       openal
       pkgconfig
  -    SDL
  +    SDL2
  +    sfml
       wxGTK
       zip
       zlib
  
positive.code: { stdenv
  , cairo
  , cmake
  , fetchsvn
  , ffmpeg
  , gettext
  , libpng
  , libpthreadstubs
  , libXdmcp
  
negative.code: , mesa
  , openal
  , pkgconfig
  , SDL2
  , sfml
  , wxGTK
  , zip
  , zlib
  }:
  
  stdenv.mkDerivation rec {
    name = "visualboyadvance-m-${version}";
    version = "unstable-2017-09-04";
    src = fetchFromGitHub {
      owner = "visualboyadvance-m";
      repo = "visualboyadvance-m";
      rev = "ceef480";
      sha256 = "1lpmlj8mv6fwlfg9m58hzggx8ld6cnjvaqx5ka5sffxd9v95qq2l";
    };
  
    buildInputs = [
  