{
  config,
  lib,
  ...
}:

with lib;

mkIf (elem "btrbk" config.machine.services) {
  services.btrbk.instances = {
    "persist" = {
      onCalendar = "hourly";
      settings = {
        timestamp_format = "long";
        snapshot_preserve_min = "1w";
        volume = {
          "/" = {
            snapshot_preserve = "20d 10w *m";
            snapshot_dir = "/snapshots";
            subvolume = "/persist";
          };
        };
      };
    };
  };
}