anchor.diff:  
   buildPythonPackage rec {
     pname = "slack-sdk";
  -  version = "3.7.0";
  +  version = "3.8.0";
     disabled = !isPy3k;
   
     src = fetchFromGitHub {
       owner = "slackapi";
       repo = "python-slack-sdk";
       rev = "v${version}";
  -    sha256 = "0bc52v5n8r3b2fy1c90w253r1abl752kaqdk6bgzkwsvbhgcxf2s";
  +    sha256 = "sha256-r3GgcU4K2jj+4aIytpY2HiVqHzChynn2BCn1VNTL2t0=";
     };
   
     propagatedBuildInputs = [
  
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: , isPy3k
  , psutil
  , pytest-asyncio
  , pytestCheckHook
  , sqlalchemy
  , websocket-client
  , websockets
  