anchor.diff:        --replace "zstdcat" "$out/bin/zstdcat"
     '';
   
  +  enableParallelBuilding = true;
  +
     meta = with stdenv.lib; {
       description = "Zstandard real-time compression algorithm";
       longDescription = ''
  
positive.code: , legacySupport ? false }:
  
  stdenv.mkDerivation rec {
    name = "zstd-${version}";
    version = "1.4.0";
  
    src = fetchFromGitHub {
      sha256 = "1gfxi3ymgavjfxh84rhfjan7l4pymwfrn051nwc7n0s3mxp09m6v";
      rev = "v${version}";
      repo = "zstd";
      owner = "facebook";
  
negative.code:       property shared by most LZ compression algorithms, such as zlib.
      '';
      homepage = https://facebook.github.io/zstd/;
      license = with licenses; [ bsd3 ]; # Or, at your opinion, GPL-2.0-only.
  
      platforms = platforms.unix;
      maintainers = with maintainers; [ orivej ];
  