anchor.diff:    version = "3.4.0";
     format = "setuptools";
   
  -  disabled = pythonOlder "3.6";
  +  disabled = pythonOlder "3.7";
   
     src = fetchFromGitHub {
       owner = "graphql-python";
  
positive.code:     pytest-console-scripts
      pytestCheckHook
      vcrpy
    ];
  
    preCheck = ''
      export PATH=$out/bin:$PATH
  
negative.code:   };
  
    propagatedBuildInputs = [
      backoff
      graphql-core
      yarl
    ];
  
  