diff --git a/webui/vite.config.ts b/webui/vite.config.ts
index f896497..e32cd09 100644
--- a/webui/vite.config.ts
+++ b/webui/vite.config.ts
@@ -79,7 +79,10 @@ function govoplanInstalledModulesPlugin(): Plugin {
 export default defineConfig({
   plugins: [govoplanInstalledModulesPlugin(), react()],
   optimizeDeps: {
-    exclude: availableWebModuleSpecifiers()
+    exclude: availableWebModuleSpecifiers(),
+    // Dataflow is discovered through the virtual module registry, so Vite's
+    // initial scan cannot see this CommonJS-backed transitive dependency.
+    include: ["@xyflow/react"]
   },
   build: {
     // Full-product builds include the host shell plus all installed module wiring.