anchor.diff:      sha256 = "f54dedcf6fea90a3e75c30cb65e0ab1e832760121f393b8d68edd711dbaf7187";
     };
   
  +  # Remove overly restrictive version constraints
  +  postPatch = ''
  +    substituteInPlace setup.py --replace "attrs>=19.1.0,<20" "attrs"
  +  '';
  +
     checkInputs = [
  +    pytestCheckHook
       dateutil
       pygments
       repeated_test
       unittest2
  -    pytest
     ];
   
     propagatedBuildInputs = [
  
positive.code:     six
    ];
  
    checkPhase = ''
      pytest
    '';
  
    meta = with stdenv.lib; {
      description = "Command-line argument parsing for Python";
      homepage = "https://github.com/epsy/clize";
      license = licenses.mit;
    };
  
  }
  
negative.code: , repeated_test
  , pygments
  , unittest2
  , pytestCheckHook
  }:
  
  buildPythonPackage rec {
  