diff --git a/systems/ceres/config/filesystem.nix b/systems/ceres/config/filesystem.nix
index 842ab14..8300d05 100755
--- a/systems/ceres/config/filesystem.nix
+++ b/systems/ceres/config/filesystem.nix
@@ -36,7 +36,7 @@ in
     };
   };
 
-  postResumeCommands = lib.mkAfter ''
+  boot.initrd.postResumeCommands = lib.mkAfter ''
     mkdir /btrfs_tmp
     mount -o subvolid=5 /dev/sdb2 /btrfs_tmp