anchor.diff:  
   buildPythonPackage rec {
     pname = "duo-client";
  -  version = "4.4.0";
  +  version = "4.5.0";
   
     src = fetchFromGitHub {
       owner = "duosecurity";
       repo = "duo_client_python";
       rev = version;
  -    sha256 = "sha256-2sodExb66+Y+aPvm+DkibPt0Bvwqjii+EoBWaopdq+E=";
  +    sha256 = "sha256-9ADFtCrSJ4Y2QQY5YC/BMvoVZs2vaYHkhIM/rBlZm4I=";
     };
   
     postPatch = ''
  
positive.code: { lib
  , buildPythonPackage
  , fetchFromGitHub
  , mock
  , nose2
  , pytz
  
negative.code:   ];
  
    checkInputs = [
      freezegun
      mock
      nose2
      pytz
  