diff --git a/default.nix b/default.nix
index 55f8e79..93035b1 100644
--- a/default.nix
+++ b/default.nix
@@ -310,7 +310,7 @@ in
         # Copy application code to writable directory if not already present or if source is newer
         echo "Syncing application code to /var/lib/usda-vision..."
         ${pkgs.rsync}/bin/rsync -av --delete \
-          --checksum
+          --checksum \
           --exclude='node_modules' \
           --exclude='.env' \
           --exclude='__pycache__' \