This is a Next.js project bootstrapped with create-next-app.

To Reproduce

initiate a new next project with App Router with npx create-next-app@latest and another in a separate folder with Pages Router with npx create-next-app@latest

then do pnpm install and then pnpm install isolated-vm on both projects.

In the App Router project add a new api route (/api) route.ts

import { NextResponse } from 'next/server';
import { Isolate } from 'isolated-vm';
import type IsolatedVM from 'isolated-vm';

export async function POST() {
  const isolate: IsolatedVM.Isolate = new Isolate({ memoryLimit: 128 });
  return NextResponse.json({ message: `isolated-vm` });
}

and in the Pages Router project add a new api route (/api) test.ts

import type { NextApiRequest, NextApiResponse } from 'next';
import { Isolate } from 'isolated-vm';
import type IsolatedVM from 'isolated-vm';

type Data = {
  message: string;
};

export default async function handler(req: NextApiRequest, res: NextApiResponse<Data>) {
  const isolate: IsolatedVM.Isolate = new Isolate({ memoryLimit: 128 });
  res.status(200).json({ message: 'John Doe' });
}

Current vs. Expected behavior

On building the Pages Router project with pnpm run build all builds successful and the endpoint /api/test responds as expected. (when running pnpm run dev)

But when building the App Router project with pnpm run build i get the following error

  ▲ Next.js 14.2.3

   Creating an optimized production build ...
Failed to compile.

./node_modules/.pnpm/isolated-vm@4.7.2/node_modules/isolated-vm/isolated-vm.js
Module not found: Can't resolve './out/isolated_vm'

https://nextjs.org/docs/messages/module-not-found

Import trace for requested module:
./src/app/api/route.ts


> Build failed because of webpack errors
 ELIFECYCLE  Command failed with exit code 1.

and the same error occurs when i call the api endpoint /api. (when running pnpm run dev)

is there a reason for this? is it as expected or is this a bug of some sorts?

environment information

Operating System:
Windows 11

Binaries:
pnpm: 9.1.0
node: v20.13.0

Relevant Packages:
next: 14.2.3
isolated-vm: 4.7.2