diff --git a/system/btrbk.nix b/system/btrbk.nix
index a845c61..8fe7cc5 100644
--- a/system/btrbk.nix
+++ b/system/btrbk.nix
@@ -1,13 +1,19 @@
 { config, pkgs, ... }:
 
 {
-  services.btrbk.instances.btrbk = {
-    onCalendar = "hourly";
-    settings = { 
-      snapshot_preserve = "40d";
-      snapshot_preserve_min = "7d";
-      snapshot_dir = "/btrbk_snapshots";
-      subvolume = "/home";
+  services.btrbk = {
+    extraPackages = [ pkgs.mbuffer ];
+    instances.btrbk = {
+      onCalendar = "hourly";
+      settings = {
+        subvolume = "/home";
+        snapshot_preserve = "40d";
+        snapshot_preserve_min = "4d";
+        snapshot_dir = "/btrbk_snapshots";
+        target = "/run/media/till/backup";
+        target_preserve_min = "no";
+        target_preserve = "40d 52w *m";
+      };
     };
   };
 }
diff --git a/system/default.nix b/system/default.nix
index aaf7bfc..6629eec 100644
--- a/system/default.nix
+++ b/system/default.nix
@@ -28,7 +28,6 @@
       "wheel"
       "networkmanager"
     ];
-    packages = with pkgs; [];
     shell = pkgs.fish;
   };