anchor.diff:  { lib
  +, appdirs
   , attrs
   , buildPythonPackage
  +, bson
   , cattrs
   , fetchFromGitHub
   , itsdangerous
  
positive.code:   ];
  
    propagatedBuildInputs = [
      attrs
      cattrs
      itsdangerous
      pyyaml
  
negative.code: 
  buildPythonPackage rec {
    pname = "requests-cache";
    version = "0.8.1";
    format = "pyproject";
  
    disabled = pythonOlder "3.7";
  
    src = fetchFromGitHub {
      owner = "reclosedev";
      repo = "requests-cache";
      rev = "v${version}";
      sha256 = "sha256-HzOcPWmvUhqPtb/7Mnw6wWY7a4CwGRwPgq+7QoHJAc8=";
    };
  
    nativeBuildInputs = [
  