anchor.diff:  
   buildPythonPackage rec {
     pname = "pkutils";
  -  version = "2.0.0";
  +  version = "3.0.2";
     format = "setuptools";
   
     disabled = pythonOlder "3.6";
  
positive.code:   checkInputs = [
      nose
    ];
  
    postPatch = ''
      # Remove when https://github.com/reubano/pkutils/pull/4 merged
      substituteInPlace requirements.txt \
        --replace "semver>=2.2.1,<2.7.3" "semver"
    '';
  
    checkPhase = ''
      runHook preCheck
  
negative.code:     owner = "reubano";
      repo = "pkutils";
      rev = "v${version}";
      hash = "sha256-AK+xX+LPz6IVLZedsqMUm7G28ue0s3pXgIzxS4EHHLE=";
    };
  
    propagatedBuildInputs = [
  