anchor.diff:      coverage run -m unittest discover -s tests -t tests
     '';
   
  +  pythonImportsCheck = [
  +    "casbin"
  +  ];
  +
     meta = with lib; {
       description = "An authorization library that supports access control models like ACL, RBAC, ABAC in Python";
       homepage = "https://github.com/casbin/pycasbin";
       license = licenses.asl20;
  -    maintainers = [ maintainers.costrouc ];
  +    maintainers = with maintainers; [ costrouc ];
     };
   }
  
positive.code: 
    propagatedBuildInputs = [
      simpleeval
    ];
  
    checkInputs = [
  
negative.code: , simpleeval
  , isPy27
  , coveralls
  , wcmatch
  }:
  
  buildPythonPackage rec {
  