{ ... }:
{

  # true => ping chungus  working
  # false => ping chungus  not working
  services.resolved = {
    llmnr = "false";
    #extraConfig = "mDNS=false";
  };

  #systemd.services.systemd-resolved.serviceConfig.Environment = "SYSTEMD_LOG_LEVEL=debug";

  #services.avahi.enable = false;
  services.avahi = {
    enable = true;
    nssmdns = true;
    extraConfig = ''
      [server]
      disallow-other-stacks=yes
    '';
    interfaces = [ "tinc.private" ];
  };
}