diff --git a/ui/vite.config.ts b/ui/vite.config.ts
index faba83a9..e0d8acb4 100644
--- a/ui/vite.config.ts
+++ b/ui/vite.config.ts
@@ -6,13 +6,20 @@ import tailwindcss from "@tailwindcss/vite";
 export default defineConfig({
   plugins: [react(), tailwindcss()],
   resolve: {
-    alias: {
-      "@": path.resolve(__dirname, "./src"),
-      lexical: path.resolve(__dirname, "./node_modules/lexical/Lexical.mjs"),
-      // [nexus] Replace upstream OnboardingWizard with Nexus single-step version
-      [path.resolve(__dirname, "src/components/OnboardingWizard")]:
-        path.resolve(__dirname, "./src/components/NexusOnboardingWizard"),
-    },
+    alias: [
+      { find: "@", replacement: path.resolve(__dirname, "./src") },
+      {
+        find: "lexical",
+        replacement: path.resolve(__dirname, "./node_modules/lexical/Lexical.mjs"),
+      },
+      // [nexus] Replace upstream OnboardingWizard with Nexus single-step version.
+      // RegExp required: string keys match the RAW import specifier (not resolved path).
+      // App.tsx imports './components/OnboardingWizard' — must match exactly.
+      {
+        find: /^\.\/components\/OnboardingWizard$/,
+        replacement: path.resolve(__dirname, "./src/components/NexusOnboardingWizard"),
+      },
+    ],
   },
   server: {
     port: 5173,