nixpkgs/pkgs/os-specific/linux/batman-adv/version.nix

{
  version = "2021.1";

  sha256 = {
    batman-adv = "1l1lk41h4chymrb41ihqrr3p80xdwhhp1kkksr157mzailyq8xxz";
    alfred = "122y92vqrpp3g6dbjfv8hkhwjlfa3skr91lbzicr0pw8mm6wzqll";
    batctl = "0xp1cqcw0g0irgw9yhkch01rbn39gzvfxv8b2yya32vbnkmqrcj4";
  };
}