flexget: pin transmission-rpc version to fix compatibility issue

          hash = "sha256-lfwC9/wfMZmqpHqKdXQ3E0z2GOnZlMhO/9U/Uww4WG8=";

        };

      });

      # Flexget's transmission plugin is not currently compatible with the 4.x

      # branch for transmission-rpc.

      transmission-rpc = super.transmission-rpc.overridePythonAttrs (old: rec {

        version = "3.4.2";

        src = fetchFromGitHub {

          owner = "Trim21";

          repo = "transmission-rpc";

          rev = "refs/tags/v${version}";

          hash = "sha256-7XbL6plIPZHQ/0Z+7bvtj8hqkh4klFyIV73DnrUAkps=";

        };

      });

    };

  };

in