nixos-configuration/machines/morpheus/btrbk.nix

{ ... }: {
  services.btrbk = {
    instances = {
      /*
      home = {
        settings = {
          snapshot_preserve = "24h 14d 4w 12m";
          snapshot_preserve_min = "latest";

          # don't auto cleanup target
          target_preserve_min = "all";

          volume."/" = {
            snapshot_dir = ".btrbk";
            subvolume = {
              home = {
                snapshot_create = "always";
              };
            };
            target = "/run/media/me/backup/morpheus";
          };
        };
      };
      */
    };
  };
}