anchor.diff:  buildPythonPackage rec {
     pname = "csvw";
     version = "1.11.0";
  +  format = "setuptools";
  +
     disabled = pythonOlder "3.6";
   
     src = fetchFromGitHub {
  
positive.code: { lib
  , buildPythonPackage
  , fetchFromGitHub
  , pythonOlder
  , attrs
  , isodate
  , python-dateutil
  , rfc3986
  , uritemplate
  , mock
  , pytestCheckHook
  , pytest-mock
  }:
  
negative.code:     rev = "v${version}";
      sha256 = "1393xwqawaxsflbq62vks92vv4zch8p6dd1mdvdi7j4vvf0zljkg";
    };
  
    propagatedBuildInputs = [
      attrs
  