anchor.diff:  buildPythonPackage rec {
     pname = "flower";
     version = "1.0.0";
  +  format = "setuptools";
   
     src = fetchPypi {
       inherit pname version;
  
positive.code: 
    propagatedBuildInputs = [
      celery
      pytz
      tornado
      humanize
      prometheus-client
    ];
  
    checkInputs = [
  
negative.code:     pytestCheckHook
    ];
  
    disabledTests = [
      # AssertionError as the celery release can't be detected
      "test_default"
      "test_with_app"
    ];
  
    pythonImportsCheck = [
      "flower"
    ];
  
    meta = with lib; {
      description = "Celery Flower";
  