anchor.diff:  { stdenv
   , lib
  -, antlr4-python3-runtime
  +, antlr4_9-python3-runtime
   , buildPythonPackage
   , fetchFromGitHub
   , importlib-resources
  
positive.code:     owner = "facebookresearch";
      repo = pname;
      rev = "v${version}";
      sha256 = "sha256:1svzysrjg47gb6lxx66fzd8wbhpbbsppprpbqssf5aqvhxgay3qk";
    };
  
    nativeBuildInputs = [
  
negative.code: 
  buildPythonPackage rec {
    pname = "hydra";
    version = "1.2.0";
    format = "setuptools";
  
    disabled = pythonOlder "3.6";
  