anchor.diff:  
     src = fetchurl {
       url = "https://tw2.bitbusters.club/downloads/tworld-${version}-src.tar.gz";
  -    sha256 = "sha256:1y55v2shk2xxcds7bdwdjaq9lka31sgdp2469zqnvldchwbvcb2i";
  +    hash = "sha256-USy2F4es0W3xT4aI254OQ02asJKNt3V0Y72LCbXYpfg=";
     };
   
  -  buildInputs = [ qt4 SDL ];
  +  buildInputs = [ SDL qt4 ];
  +
     enableParallelBuilding = true;
   
     postConfigure = ''
  
positive.code: { stdenv
  , lib
  , fetchurl
  , qt4
  , SDL
  }:
  
  stdenv.mkDerivation rec {
  
negative.code:   '';
  
    meta = with lib; {
      homepage = "https://tw2.bitbusters.club/";
      description = "Tile World 2: Tile World is a reimplementation of the game Chip's Challenge";
      license = licenses.gpl2Plus;
      maintainers = with maintainers; [ drperceptron ];
      platforms = platforms.linux;
    };
  }
  