{fetchgit}:
fetchgit {
  url = "https://github.com/mautrix/whatsapp";
  rev = "7edd9f32377d4bbdcd55d369524bc58e1be65dba";
  sha256 = "1shkhz54m3dzajx6qa3yc957cky4zz287h0f84bv0n35w9l2kv60";
  leaveDotGit = true;
}