anchor.diff:      owner = "Danielhiversen";
       repo = "PyGraphqlWebsocketManager";
       rev = version;
  -    sha256 = "sha256-7MqFsttMNnWmmWKj1zaOORBTDGt6Wm8GU7w56DfPl2c=";
  +    hash = "sha256-7MqFsttMNnWmmWKj1zaOORBTDGt6Wm8GU7w56DfPl2c=";
     };
   
     propagatedBuildInputs = [
  
positive.code: buildPythonPackage rec {
    pname = "graphql-subscription-manager";
    version = "0.5.5";
  
    disabled = pythonOlder "3.7";
  
  
negative.code:   # no tests implemented
    doCheck = false;
  
    pythonImportsCheck = [
      "graphql_subscription_manager"
    ];
  
    meta = with lib; {
      description = "Python3 library for graphql subscription manager";
  