diff --git a/common/nfs-services-server.nix b/common/nfs-services-server.nix
index 6e8e935..dbe44d5 100644
--- a/common/nfs-services-server.nix
+++ b/common/nfs-services-server.nix
@@ -122,7 +122,8 @@ in
             btrfs subvolume snapshot -r /persist/services "$SNAPSHOT_PATH"
 
             # Find previous snapshot on sender (sort by name since readonly snapshots have same mtime)
-            PREV_LOCAL=$(ls -1 /persist/services@* 2>/dev/null | grep -v "^$SNAPSHOT_PATH$" | sort -r | head -1 || true)
+            # Use -d to list directories only, not their contents
+            PREV_LOCAL=$(ls -1d /persist/services@* 2>/dev/null | grep -v "^$SNAPSHOT_PATH$" | sort -r | head -1 || true)
 
             # Try incremental send if we have a parent, fall back to full send if it fails
             if [ -n "$PREV_LOCAL" ]; then