anchor.diff: -{ lib, buildPythonPackage, fetchFromGitHub
  +{ lib
  +, buildPythonPackage
  +, fetchFromGitHub
   , betamax
   , betamax-serializers
   , betamax-matchers
   , mock
  -, six
  -, pytestrunner
   , prawcore
  -, pytest
  +, pytestCheckHook
   , requests-toolbelt
   , update_checker
   , websocket_client
  
positive.code: 
    src = fetchFromGitHub {
      owner = "praw-dev";
      repo = "praw";
      rev = "v${version}";
      sha256 = "sha256-aEx0swjfyBrSu1fgIiAwdwWmk9v5o7sbT5HTVp7L3R4=";
    };
  
    nativeBuildInputs = [
      pytestrunner
    ];
  
    propagatedBuildInputs = [
      mock
  
negative.code:     betamax
      betamax-serializers
      betamax-matchers
      pytestCheckHook
      requests-toolbelt
    ];
  
    pythonImportsCheck = [ "praw" ];
  
    meta = with lib; {
      description = "Python Reddit API wrapper";
      homepage = "https://praw.readthedocs.org/";
      license = licenses.bsd2;
      maintainers = with maintainers; [ fab ];
    };
  }
  