anchor.diff:  
     postInstall = ''
       mv $out/games/ $out/bin
  +
  +    ${stdenv.lib.optionalString withOpenGFX ''
  +      cp ${opengfx}/* $out/share/games/openttd/baseset
  +    ''}
  +
  +    mkdir -p $out/share/games/openttd/data
  +
  +    ${stdenv.lib.optionalString withOpenSFX ''
  +      cp ${opensfx}/*.{obs,cat} $out/share/games/openttd/data
  +    ''}
  +
  +    ${stdenv.lib.optionalString withOpenMSX ''
  +      cp ${openmsx}/*.{obm,mid} $out/share/games/openttd/data
  +    ''}
     '';
   
     meta = {
  
positive.code:     sha256 = "0qxss5rxzac94z5k16xv84ll0n163sphs88xkgv3z7vwramagffq";
    };
  
    buildInputs = [ SDL libpng pkgconfig xz zlib freetype fontconfig ];
    prefixKey = "--prefix-dir=";
  
    configureFlags = [
  
negative.code:     homepage = http://www.openttd.org/;
      license = stdenv.lib.licenses.gpl2;
      platforms = stdenv.lib.platforms.unix;
      maintainers = with stdenv.lib.maintainers; [ jcumming the-kenny fpletz ];
    };
  }
  