anchor.diff:      six
       tqdm
       urllib3
  -  ];
  +  ] ++ lib.optionals stdenv.isDarwin [ idna cryptography pyopenssl ];
   
     checkInputs = [
       pkg-config
  
positive.code: { lib, python3, fetchFromGitHub, git, pkg-config }:
  
  # Note:
  # Conan has specific dependency demands; check
  
negative.code:     description = "Decentralized and portable C/C++ package manager";
      license = licenses.mit;
      maintainers = with maintainers; [ HaoZeke ];
    };
  }
  