anchor.diff:  , cargoSha256
   }:
   
  -{ stdenv
  +{ lib
   , fetchFromGitHub
   , rustPlatform
  +
   , pkgconfig
   , openssl
   , systemd
  
positive.code: }:
  
  rustPlatform.buildRustPackage rec {
    name = "parity-${version}";
    inherit cargoSha256;
  
    src = fetchFromGitHub {
  
negative.code:   # test result: FAILED. 80 passed; 12 failed; 0 ignored; 0 measured; 0 filtered out
    doCheck = false;
  
    meta = with lib; {
      description = "Fast, light, robust Ethereum implementation";
      homepage = "http://parity.io";
      license = licenses.gpl3;
      maintainers = with maintainers; [ akru xrelkd ];
      platforms = platforms.linux;
    };
  }
  