diff --git a/nodes/lappy/filesystems.nix b/nodes/lappy/filesystems.nix
index 93b43e2..a3cb6e3 100644
--- a/nodes/lappy/filesystems.nix
+++ b/nodes/lappy/filesystems.nix
@@ -20,7 +20,7 @@
     };
 
   fileSystems."/nix/persist" =
-    { device = "/dev/disk/by-uuid/830e6948-9661-47b2-968d-e939b4bb83b1";
+    { device = "/dev/mapper/cryptroot";
       fsType = "btrfs";
       options = [ "subvol=persist" "compress=zstd" "noatime" ];
       neededForBoot = true;