anchor.diff:      databases
       flake8
       flask-sockets
  +    moto
       psutil
       pytest-asyncio
       pytestCheckHook
  
positive.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 = [
  
negative.code: , fetchFromGitHub
  , flake8
  , flask-sockets
  , moto
  , pythonOlder
  , psutil
  , pytest-asyncio
  , pytestCheckHook
  