anchor.diff:  { stdenv
   , fetchurl
   , unzip
  +, copyDesktopItems
   , makeDesktopItem
   , imagemagick
   , SDL
  
positive.code:     platforms = platforms.all;
    };
  }
  
  
negative.code:   };
    sourceRoot = (if isStereo then "gt2stereo/trunk" else "goattrk2") + "/src";
  
    nativeBuildInputs = [ copyDesktopItems unzip imagemagick ];
    buildInputs = [ SDL ];
  
    # PREFIX gets treated as BINDIR.
  