anchor.diff:      owner = pname;
       repo = "pycasbin";
       rev = "refs/tags/v${version}";
  -    sha256 = "sha256-1xxjFNkCb50ndmXuRjt7svPOvSyzZbw+J49Zpyy1FUc=";
  +    hash = "sha256-fBMhrA4zL4XPjQ63AGc5jf585ZpHTBumPievDNfCw7o=";
     };
   
     propagatedBuildInputs = [
  
positive.code: { lib
  , buildPythonPackage
  , fetchFromGitHub
  , simpleeval
  , pythonOlder
  , coveralls
  , wcmatch
  }:
  
  buildPythonPackage rec {
    pname = "casbin";
    version = "1.16.9";
    format = "setuptools";
  
    disabled = pythonOlder "3.6";
  
negative.code:   ];
  
    checkInputs = [
      pytestCheckHook
    ];
  
    pythonImportsCheck = [
      "casbin"
    ];
  
    meta = with lib; {
      description = "Authorization library that supports access control models like ACL, RBAC and ABAC";
      homepage = "https://github.com/casbin/pycasbin";
      license = licenses.asl20;
      maintainers = with maintainers; [ costrouc ];
  