anchor.diff:      sha256 = "sha256-C4WP8tiMRFmkDkQRrvP3yOSM2zN8pHJmX9cdANIckpM=";
     };
   
  +  nativeBuildInputs = [
  +    cython
  +  ];
  +
     propagatedBuildInputs = [
  +    devtools
       email_validator
       python-dotenv
       typing-extensions
  -    ujson
     ];
   
     checkInputs = [
  
positive.code: { lib
  , buildPythonPackage
  , email_validator
  , fetchFromGitHub
  , pytest-mock
  
negative.code: , python-dotenv
  , pythonOlder
  , typing-extensions
  }:
  
  buildPythonPackage rec {
  