{fetchgit}:
fetchgit {
  url = "https://github.com/mautrix/whatsapp";
  rev = "e5ca572811fa8cd53ee1ebda98d1932d365fa05c";
  sha256 = "179q73aa2hyq4wlrn81xpkk1wxl6pijk2p311gzw7px8wkbi5876";
  leaveDotGit = true;
}