[WxtBuilder]: importEntrypoint is causing xxx not defined error.

Describe the bug

As entrypointLoader is going to be deparecated or has, by default vite-node to import entrypoints as of version 0.19.0

using await wxt.builder.importEntrypoint(entrypointPath) to import options is breaking.

Reproduction

add a file in modules sub-folder of the project
Add this below code

demo.ts

import { addEntrypoint, defineWxtModule } from 'wxt/modules';
import path, { resolve } from 'node:path';

export default defineWxtModule(async (wxt) => {
  const entrypointPath = resolve(
    path.join('src', 'entrypoints'),
    'unlisted.ts',
  );

  console.log({
    entrypointPath,
    dd: await wxt.builder.importEntrypoint(entrypointPath),
  });
  addEntrypoint(wxt, {
    type: 'unlisted-script',
    name: 'demo-module',
    inputPath: entrypointPath,
    outputDir: wxt.config.outDir,
    options: {},
  });
});

Add a unlisted.ts file inside entrypoints sub-folder of the project.

unlisted.ts

export default defineUnlistedScript(() => {
  console.log('injected');
});

Try running

pnpm build

Steps to reproduce

No response

System Info

System:
    OS: Windows 11 10.0.22631
    CPU: (8) x64 Intel(R) Core(TM) i3-10105 CPU @ 3.70GHz
    Memory: 827.90 MB / 7.84 GB
  Binaries:
    Node: 22.0.0 - C:\Program Files\nodejs\node.EXE
    npm: 10.2.5 - C:\Program Files\nodejs\npm.CMD
    pnpm: 9.13.0 - C:\Program Files\nodejs\pnpm.CMD
  Browsers:
    Edge: Chromium (131.0.2903.86)
    Internet Explorer: 11.0.22621.3527

Used Package Manager

pnpm

Validations

• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion or join our Discord Chat Server.
• The provided reproduction is a minimal reproducible example of the bug.

Start with the WxtBuilder importEntrypoint entry point and the entrypointLoader/vite-node behavior described in the issue. Reproduce the example using demo.ts and unlisted.ts, then run pnpm build and inspect the resulting “not defined” error. Done means importing the entrypoint options no longer fails in this reproduction.