diff --git a/e2e/ui/fixture-server.mjs b/e2e/ui/fixture-server.mjs
index fa6bdd86..d2f5bf3d 100644
--- a/e2e/ui/fixture-server.mjs
+++ b/e2e/ui/fixture-server.mjs
@@ -30,6 +30,7 @@ const bundle = await build({
 	outdir: path.join(root, "test-results/ui-fixture"),
 	format: "iife",
 	jsx: "automatic",
+	platform: "node",
 	alias: { "@": path.join(root, "src") },
 	define: { "process.env.NODE_ENV": '"production"' },
 	plugins: [