anchor.diff:    pname = "certifi";
     version = "2021.10.08";
   
  -  disabled = isPy27;
  +  disabled = pythonOlder "3.5";
   
     src = fetchFromGitHub {
       owner = pname;
  
positive.code: { lib
  , buildPythonPackage
  , isPy27
  , fetchFromGitHub
  , pytestCheckHook
  }:
  
negative.code:     homepage = "https://github.com/certifi/python-certifi";
      description = "Python package for providing Mozilla's CA Bundle";
      license = licenses.isc;
      maintainers = with maintainers; [ koral SuperSandro2000 ];
    };
  }
  