diff --git a/hosts/desktop/valhalla/hardware-configuration.nix b/hosts/desktop/valhalla/hardware-configuration.nix
index f15a609..4a21de4 100644
--- a/hosts/desktop/valhalla/hardware-configuration.nix
+++ b/hosts/desktop/valhalla/hardware-configuration.nix
@@ -14,8 +14,9 @@
   boot.extraModulePackages = [ ];
 
   fileSystems."/" =
-    { device = "/dev/disk/by-uuid/9d8ba6f0-5ade-482b-b6f4-b4228737c72c";
-      fsType = "xfs";
+    { device = "/dev/disk/by-uuid/ebd125c4-ab78-4604-a0be-826d0a3d0c03";
+      fsType = "btrfs";
+      options = [ "subvol=@" ];
     };
 
   fileSystems."/boot" =