anchor.diff:  
     enableParallelBuilding = true;
   
  +  passthru.tests.static = pkgsStatic.libdeflate;
     meta = with lib; {
       description = "Fast DEFLATE/zlib/gzip compressor and decompressor";
       license = licenses.mit;
       homepage = "https://github.com/ebiggers/libdeflate";
       platforms = platforms.unix;
  -    maintainers = with maintainers; [ orivej ];
  +    maintainers = with maintainers; [ orivej kaction ];
     };
   }
  
positive.code: { stdenv, lib, fetchFromGitHub, fixDarwinDylibNames }:
  
  stdenv.mkDerivation rec {
    pname = "libdeflate";
  
negative.code:     sha256 = "sha256-P7YbuhP2/zJCpE9dxZev1yy5oda8WKAHY84ZLTL8gVs=";
    };
  
    patches = [
      (fetchpatch {
        url = "https://github.com/ebiggers/libdeflate/commit/ee4d18872bfe09a32cfd031c716b9069a04a50a0.diff";
        sha256 = "0d2lllg60zbbbch0w0qrcqijrgski8xlsy5llg3i684d66ci538a";
      })
    ];
  
    postPatch = ''
      substituteInPlace Makefile --replace /usr/local $out
    '';
  
    makeFlags = lib.optional stdenv.hostPlatform.isStatic [ "DISABLE_SHARED=1"];
  
    nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin fixDarwinDylibNames;
  
  