diff --git a/nixos/common/software/cli/scripts/btrfs-backup.sh b/nixos/common/software/cli/scripts/btrfs-backup.sh
index 33a4dcfd..a07a90a2 100755
--- a/nixos/common/software/cli/scripts/btrfs-backup.sh
+++ b/nixos/common/software/cli/scripts/btrfs-backup.sh
@@ -53,8 +53,7 @@ create_lock() {
     fi
 
     # Create new lock file with current PID
-    sudo touch "$LOCK_FILE"
-    sudo echo $$ > "$LOCK_FILE"
+    sudo echo $$ | sudo tee "$LOCK_FILE"
 
     # Ensure lock file is removed on script exit
     trap cleanup_lock EXIT