anchor.diff:    pname = "apache-airflow";
     inherit version;
     src = airflow-src;
  +
  +  disabled = pythonOlder "3.6";
   
     propagatedBuildInputs = [
       alembic
  
positive.code:   ];
  
    disabledTests = lib.optionals stdenv.isDarwin [
      "bash_operator_kill"  # psutil.AccessDenied
    ];
  
    postInstall = ''
  
negative.code:     httpx
      iso8601
      importlib-resources
      inflection
      itsdangerous
      jinja2
  