{fetchgit}:
fetchgit {
  url = "https://github.com/mautrix/whatsapp";
  rev = "0796d14133c19d5e18223b6f138835229b7acf10";
  sha256 = "1a8d3rn9xsmxc8sd4iwfsrgia49nygc9va2n8v1ja2smn560pyq1";
  leaveDotGit = true;
}