anchor.diff:  
   buildPythonPackage rec {
     pname = "git-revise";
  -  version = "0.4.2";
  +  version = "0.5.0";
   
     src = fetchPypi {
       inherit pname version;
  -    sha256 = "1mq1fh8m6jxl052d811cgpl378hiq20a8zrhdjn0i3dqmxrcb8vs";
  +    sha256 = "16sxmxksb5gjj6zfh1wy2czqj9nm4sd3j4fbrsphs8l065dzzikj";
     };
   
  -  disabled = !(pythonAtLeast "3.6");
  +  disabled = pythonOlder "3.6";
   
     checkInputs = [ tox pytest pylint mypy black ];
   
  
positive.code: { lib
  , buildPythonPackage
  , fetchPypi
  , pythonAtLeast
  , tox
  , pytest
  , pylint
  
negative.code:   meta = with lib; {
      description = "Efficiently update, split, and rearrange git commits";
      homepage = https://github.com/mystor/git-revise;
      changelog = "https://github.com/mystor/git-revise/blob/${version}/CHANGELOG.md";
      license = licenses.mit;
      maintainers = with maintainers; [ emily ];
    };
  