anchor.diff:      "--localstatedir=/var"
       "--disable-unittests"
       "--enable-systemd"
  +    "--enable-lzma"
  +    "--enable-zstd"
       "--with-tcmalloc"
     ];
   
  
positive.code:     libsodium
      openssl
      systemd_lib
      zlib
    ];
  
    postPatch = ''
  
negative.code: , libsodium
  , openssl
  , systemd_lib
  , xz
  , zlib
  , zstd
  }:
  
  stdenv.mkDerivation rec {
    name = "tor-0.3.1.7";
  
    src = fetchurl {
      url = "https://www.torproject.org/dist/${name}.tar.gz";
      multihash = "Qmckk7KgPvzaWMeqvbYXa1B8yts9UgtUyqoKs5TA7ivVKX";
      hashOutput = false;
      sha256 = "1df5dd4894bb2f5e0dc96c466955146353cf33ac50cd997cfc1b28ea3ed9c08f";
    };
  
    nativeBuildInputs = [
  