anchor.diff:        --replace "coverage>=4.0,<4.4" "coverage"
     '';
   
  -  # Test failures but patch does not apply cleanly
  -  # https://github.com/benoitc/gunicorn/commit/f38f717539b1b7296720805b8ae3969c3509b9c1
  -  doCheck = false;
  +  # better than no tests
  +  checkPhase = ''
  +    $out/bin/gunicorn --help > /dev/null
  +  '';
  +
  +  pythonImportsCheck = [ "gunicorn" ];
   
     meta = with stdenv.lib; {
       homepage = https://pypi.python.org/pypi/gunicorn;
  
positive.code:     sha256 = "fa2662097c66f920f53f70621c6c58ca4a3c4d3434205e608e121b5b3b71f4f3";
    };
  
    checkInputs = [ pytest mock pytestcov coverage ];
  
    prePatch = ''
  
negative.code: { stdenv, buildPythonPackage, fetchPypi
  , coverage
  , mock
  , pytest
  , pytestcov
  , setuptools
  }:
  
  buildPythonPackage rec {
    pname = "gunicorn";
  