anchor.diff:  
     src = openrct2-src;
   
  +  nativeBuildInputs = [
  +    cmake
  +    pkgconfig
  +  ];
  +
     buildInputs = [
       SDL2
  -    cmake
       curl
       fontconfig
       freetype
  
positive.code:     libzip
      libGLU
      openssl
      pkgconfig
      speexdsp
      zlib
    ];
  
negative.code: 
  let
    name = "openrct2-${version}";
    version = "0.2.4";
  
    openrct2-src = fetchFromGitHub {
      owner = "OpenRCT2";
      repo = "OpenRCT2";
      rev = "v${version}";
      sha256 = "1rlw3w20llg36sj3bk50g661qw766ng8ma3p42sdkj8br9dw800h";
    };
  
    objects-src = fetchFromGitHub {
      owner = "OpenRCT2";
      repo = "objects";
      rev = "v1.0.12";
      sha256 = "0vfhyldc8nfvkg4d9kry669haxz2165walbxzgza7pqpnd7aqgrf";
    };
  
    title-sequences-src = fetchFromGitHub {
      owner = "OpenRCT2";
      repo = "title-sequences";
      rev = "v0.1.2c";
      sha256 = "1qdrm4q75bznmgdrpjdaiqvbf3q4vwbkkmls45izxvyg1djrpsdf";
    };
  in
  stdenv.mkDerivation {
  