{pkgs, ...}: {
  systemd.services.udp2tcp = {
    wantedBy = ["multi-user.target"];
    after = ["network.target"];

    restartIfChanged = true;

    path = with pkgs; [dig.host];

    script = ''
      ${pkgs.udp-over-tcp}/bin/tcp2udp\
        --tcp-listen 127.0.0.1:6001 \
        --tcp-listen "$(host redalder.org | sed -e 's/.* //'):6001" \
        --udp-forward 127.0.0.1:6666
    '';
  };
}