anchor.diff:  { fetchurl, stdenv, SDL, SDL_image, SDL_mixer, SDL_sound, libsigcxx, physfs
  -, boost, expat, freetype, libjpeg, wxGTK, lua, perl, pkgconfig, zlib, zip, bzip2,
  -libpng, libtiff, fluidsynth, libmikmod }:
  +, boost, expat, freetype, libjpeg, wxGTK, lua, perl, pkgconfig, zlib, zip, bzip2
  +, libpng, libtiff, fluidsynth, libmikmod, libvorbis, flac, libogg }:
   
   stdenv.mkDerivation rec {
     name = "asc-2.6.0.0";
  
positive.code:     longDescription = ''
        Advanced Strategic Command is a free, turn based strategy game. It is
        designed in the tradition of the Battle Isle series from Bluebyte and is
        currently available for Windows and Linux. 
      '';
  
      homepage = http://www.asc-hq.org/;
  
negative.code:   buildInputs = [
      SDL SDL_image SDL_mixer SDL_sound libsigcxx physfs boost expat
      freetype libjpeg wxGTK lua perl pkgconfig zlib zip bzip2 libpng
      libtiff fluidsynth libmikmod flac libvorbis libogg
    ];
  
    meta = with stdenv.lib; {
  