anchor.diff:  , isPy3k
   , psutil
   , pytest-asyncio
  -, pytest-cov
   , pytestCheckHook
  -, pytestrunner
   , sqlalchemy
   , websocket-client
   , websockets
  
positive.code:     flask-sockets
      psutil
      pytest-asyncio
      pytest-cov
      pytestCheckHook
      pytestrunner
    ];
  
    preCheck = ''
      export HOME=$(mktemp -d)
    '';
  
    # Exclude tests that requires network features
    pytestFlagsArray = [ "--ignore=integration_tests" ];
    disabledTests = [
      "test_start_raises_an_error_if_rtm_ws_url_is_not_returned"
      "test_org_installation"
    ];
  
    pythonImportsCheck = [ "slack_sdk" ];
  
negative.code: 
  buildPythonPackage rec {
    pname = "slack-sdk";
    version = "3.8.0";
    disabled = !isPy3k;
  
    src = fetchFromGitHub {
      owner = "slackapi";
      repo = "python-slack-sdk";
      rev = "v${version}";
      sha256 = "sha256-r3GgcU4K2jj+4aIytpY2HiVqHzChynn2BCn1VNTL2t0=";
    };
  
    propagatedBuildInputs = [
  