{pkgs, ...}: {
  # Update Musicbrainz search indexes once a week.
  systemd.timers."musicbrainz-update-indexes" = {
    wantedBy = ["timers.target"];
    timerConfig = {
      OnCalendar = "weekly";
      Persistent = true;
      Unit = "musicbrainz-update-indexes.service";
    };
  };

  systemd.services."musicbrainz-update-indexes" = {
    script = ''
      set -eu
      cd /home/fern/docker/stacks/musicbrainz
      ${pkgs.docker}/bin/docker compose exec -T indexer python -m sir reindex --entity-type artist --entity-type release
    '';
    serviceConfig = {
      Type = "oneshot";
      User = "fern";
    };
  };

  flock.docker = {
    enable = true;
    dockerMount = true;
  };
}