diff --git a/nix/os/containers/backup.nix b/nix/os/containers/backup.nix
index 3ac35d9..6e1a9b6 100644
--- a/nix/os/containers/backup.nix
+++ b/nix/os/containers/backup.nix
@@ -60,7 +60,7 @@ in {
       path = with pkgs; [ btrfs-progs btrbk coreutils ];
 
       script = let 
-        bktrbkConf = pkgs.writeText "cfg" ''
+        btrbkConf = pkgs.writeText "cfg" ''
           timestamp_format long
           ssh_identity ${passwords.storage.homeChBackup.keyPath}
           ssh_user ${passwords.storage.homeChBackup.user}
@@ -71,7 +71,7 @@ in {
           snapshot_create onchange
           snapshot_preserve_min latest
           snapshot_preserve 7d 4w
-          target_preserve_min no
+          target_preserve_min latest
           target_preserve 7d 4w 12m *y
 
           volume ${subvolumeParentDir}
@@ -82,7 +82,7 @@ in {
         #! ${pkgs.bash}/bin/bash
         set -Eeuxo pipefail
 
-        btrbk -c ${bktrbkConf} --progress ''${@:-run}
+        btrbk -c ${btrbkConf} --progress ''${@:-run}
       '';
     };