anchor.diff:  
     enableParallelBuilding = true;
   
  -  makeFlags = [ "OPT=true"
  -                "RELEASE=true"
  -                "DATA_DIR=$(out)/share"
  -                "ENABLE_LOCAL_USER_DIR=true"
  -              ];
  +  makeFlags = [
  +    "OPT=true"
  +    "RELEASE=true"
  +    "DATA_DIR=$(out)/share"
  +    "ENABLE_LOCAL_USER_DIR=true"
  +    "NO_STEAMWORKS=true"
  +  ];
   
     installPhase = ''
       install -Dm755 keeper $out/bin/keeper
  
positive.code:   '';
  
    buildInputs = [
      openal curl libogg libvorbis SDL2 SDL2_image zlib
    ];
  
    NIX_CFLAGS_COMPILE = [
  
negative.code:     description = "A dungeon management rogue-like";
      homepage = "https://keeperrl.com/";
      license = licenses.gpl2;
      maintainers = with maintainers; [ onny ];
      # TODO: Add OS X
      platforms = [ "i686-linux" "x86_64-linux" ];
    };
  