{
  pkgs,
  lib,
  config,
  ...
}:
with lib; let
  cfg = config.primary;
in {
  options.primary = {enable = mkEnableOption "is primary host";};
  config = mkIf cfg.enable {
    systemd = {
      user = {
        services = {
          do_agenda = {
            description = "Send today's agenda";
            unitConfig = {Type = "simple";};
            serviceConfig = {
              Type = "oneshot";
              Environment = "PATH=/run/current-system/sw/bin:/etc/profiles/per-user/don/bin:/home/don/bin";
              ExecStart = "/home/don/bin/do_agenda";
            };
          };
          do_agenda_tomorrow = {
            description = "Send tomorrow's agenda";
            unitConfig = {Type = "simple";};
            serviceConfig = {
              Type = "oneshot";
              Environment = "PATH=/run/current-system/sw/bin:/etc/profiles/per-user/don/bin:/home/don/bin";
              ExecStart = "/home/don/bin/do_agenda.tomorrow";
            };
          };
          gosleep = {
            description = "Adjust tailscale MTU based on location";
            unitConfig = {Type = "simple";};
            serviceConfig = {
              Type = "oneshot";
              Environment = "PATH=/run/current-system/sw/bin:/etc/profiles/per-user/don/bin:/home/don/bin";
              ExecStart = "/home/don/bin/gosleep";
            };
          };
        };
        timers = {
          do_agenda = {
            wantedBy = ["timers.target"];
            partOf = ["do_agenda.service"];
            timerConfig = {
              OnCalendar = "05:00";
              Unit = "do_agenda.service";
            };
          };
          do_agenda_tomorrow = {
            wantedBy = ["timers.target"];
            partOf = ["do_agenda_tomorrow.service"];
            timerConfig = {
              OnCalendar = "20:00";
              Unit = "do_agenda_tomorrow.service";
            };
          };
          gosleep = {
            wantedBy = ["timers.target"];
            partOf = ["gosleep.service"];
            timerConfig = {
              OnCalendar = "1m";
              Unit = "gosleep.service";
            };
          };
        };
      };
    };
  };
}