{ pkgs, config, lib, ... }:

with lib;
let cfg = config.eilean;
in {
  options.eilean.acme-eon = mkEnableOption "acme-eon";

  config = mkIf cfg.acme-eon {
    assertions = [{
      assertion = cfg.services.dns.server == "eon";
      message = ''
        If config.eilean.acme-eon is enabled config.eilean.services.dns.server must be "eon".
      '';
    }];
  };
}