Clean up montalin configuration

host/montalin/backup.nix

@@ -0,0 +1,34 @@
+{ config, pkgs, ... }:
+
+let mountService = "var-backup.mount";
+    repo = "/var/backup/montalin"; # TODO: Does this make sense?
+{
+  services.borgbackup.jobs = rec {
+    data = {
+      exclude = [
+        "/var/backup" #TODO: Does this make sense?
+        "/var/tmp"
+        "/var/cache"
+      ];
+      paths = [
+        "/etc"
+        "/home"
+        "/root"
+        "/var"
+      ];
+      preHook = "systemctl mount ${mountService}";
+      postHook = "systemctl stop ${mountService}";
+      prune.keep = {
+        within = "14d";
+        weekly = 4;
+        monthly 6;
+        yearly = -1;
+
+      };
+      removeableDevices = true;
+      repo = repo;
+      startAt = ; #TODO: systemdtime
+      environment.BORG_BASE_DIR="${repo}/borg-base-dir";
+    };
+  };
+}