anchor.diff:  { lib
   , buildPythonPackage
   , fetchFromGitHub
  -, fetchpatch
   , poetry-core
   , requests-mock
   , pythonOlder
  
positive.code: 
  buildPythonPackage rec {
    pname = "flipr-api";
    version = "1.4.1";
    format = "pyproject";
  
    disabled = pythonOlder "3.6";
  
negative.code:     pytestCheckHook
    ];
  
    pythonImportsCheck = [
      "flipr_api"
    ];
  
    meta = with lib; {
      description = "Python client for Flipr API";
  