{fetchgit}:
fetchgit {
  url = "https://github.com/mautrix/whatsapp";
  rev = "985b33fd7caf7556cbcabd4c8a2b80d9ea7cce94";
  sha256 = "0fg3a5i848ffkd9vfa2x9d91cnfpwnhbxbn944pw193ljl8dwx6w";
  leaveDotGit = true;
}