anchor.diff:      owner = "mahmoud";
       repo = "boltons";
       rev = version;
  -    hash = "sha256-iCueZsi/gVbko7MW43vaUQMWRVI/YhmdfN29gD6AgG8=";
  +    hash = "sha256-8HO7X2PQEbQIQsCa2cMHQI3rlofVT22GYrWNXY34MLk=";
     };
   
     checkInputs = [
  
positive.code: 
  buildPythonPackage rec {
    pname = "boltons";
    version = "20.2.1";
    format = "setuptools";
  
    disabled = pythonOlder "3.7";
  
negative.code:       url = "https://github.com/mahmoud/boltons/commit/270e974975984f662f998c8f6eb0ebebd964de82.patch";
        sha256 = "sha256-pZLfr6SRCw2aLwZeYaX7bzfJeZC4cFUILEmnVsKR6zc=";
      })
    ];
  
    pythonImportsCheck = [
  