anchor.diff:  
   buildPythonPackage rec {
     pname = "levenshtein";
  -  version = "0.19.3";
  +  version = "0.20.2";
     format = "pyproject";
   
     disabled = pythonOlder "3.6";
  
positive.code:     owner = "maxbachmann";
      repo = "Levenshtein";
      rev = "refs/tags/v${version}";
      hash = "sha256-4Oc1n/ZgLdq57ZeyZHzTQOjar9Ligeb4yqKeT0s5dHY=";
    };
  
    nativeBuildInputs = [
  
negative.code:   meta = with lib; {
      description = "Functions for fast computation of Levenshtein distance and string similarity";
      homepage = "https://github.com/maxbachmann/Levenshtein";
      changelog = "https://github.com/maxbachmann/Levenshtein/blob/${src.rev}/HISTORY.md";
      license = licenses.gpl2Plus;
      maintainers = with maintainers; [ fab ];
    };
  