diff --git a/code/lib/builder-vite/input/iframe.html b/code/lib/builder-vite/input/iframe.html
index 5e522dda6c44..874cf855e9a7 100644
--- a/code/lib/builder-vite/input/iframe.html
+++ b/code/lib/builder-vite/input/iframe.html
@@ -25,7 +25,7 @@
     <!-- [BODY HTML SNIPPET HERE] -->
     <div id="storybook-root"></div>
     <div id="storybook-docs"></div>
-    <script type="module" src="/sb-preview/runtime.mjs"></script>
+    <script type="module" src="./sb-preview/runtime.mjs"></script>
     <script type="module" src="/virtual:/@storybook/builder-vite/vite-app.js"></script>
   </body>
 </html>
diff --git a/code/lib/builder-vite/src/build.ts b/code/lib/builder-vite/src/build.ts
index a9ba1a37b01c..dbb6feefb011 100644
--- a/code/lib/builder-vite/src/build.ts
+++ b/code/lib/builder-vite/src/build.ts
@@ -15,7 +15,7 @@ export async function build(options: ExtendedOptions) {
       sourcemap: true,
       rollupOptions: {
         // Do not try to bundle the storybook runtime, it is copied into the output dir after the build.
-        external: ['/sb-preview/runtime.mjs'],
+        external: ['./sb-preview/runtime.mjs'],
       },
     },
   }).build;