anchor.diff:  { stdenv, fetchurl, SDL, SDL_ttf, SDL_image, SDL_mixer, pkgconfig, lua, zlib, unzip }:
   
   let
  -  version = "1.2.2";
  +  version = "1.9.1";
   
  -  # I took two games at random from http://instead.syscall.ru/games/
  +  # I took several games at random from http://instead.syscall.ru/games/
     games = [
       (fetchurl {
         url = http://instead-games.googlecode.com/files/instead-apple-day-1.2.zip;
         sha256 = "0d4m554hiqmgl4xl0jp0b3bqjl35879768hqznh9y57y04sygd2a";
  -    })
  -    (fetchurl {
  -      url = http://instead-games.googlecode.com/files/instead-cat-1.3.zip;
  -      sha256 = "0vmsn7jg2vy5kqqbzad289vk4j3piarj1xpwyz72wgyc3k7djg4v";
       })
       (fetchurl {
         url = http://instead-games.googlecode.com/files/instead-cat_en-1.2.zip;
  
positive.code:   buildInputs = [ SDL SDL_ttf SDL_image SDL_mixer pkgconfig lua zlib unzip ];
  
    configurePhase = ''
      sed -i -e "s,DATAPATH=.,DATAPATH=$out/share/${name}/," Rules.make
    '';
  
    inherit games;
  
    installPhase = ''
      mkdir -p $out/bin $out/share/${name}
      cp sdl-instead $out/bin
      cp -R games languages stead themes $out/share/${name}
      pushd $out/share/${name}/games
      for a in $games; do
        unzip $a
      done
  
negative.code:       sha256 = "15qdbg82zp3a8vz4qxminr0xbzbdpnsciliy2wm3raz4hnadawg1";
      })
      (fetchurl {
        url = http://instead-games.googlecode.com/files/instead-toilet3in1-1.2.zip;
        sha256 = "0wz4bljbg67m84qwpaqpzs934a5pcbhpgh39fvbbbfvnnlm4lirl";
      })
      (fetchurl {
        url = http://instead-games.googlecode.com/files/instead-kayleth-0.4.1.zip;
        sha256 = "0xmn9inys0kbcdd02qaqp8gazqs67xq3fq7hvcy2qb9jbq85j8b2";
      })
    ];
  in
  