Link to the code that reproduces this issue

https://github.com/spaceness/stardust/tree/nextjs-canary/apps/web

To Reproduce

1. Start the application in development or attempt a build (no need to setup anything)
2. See the logs in the console:

Failed to compile.

../../packages/common/auth/index.ts
Module parse failed: Unexpected token (4:14)
You may need an appropriate loader to handle this file type, currently no loaders are configured to process this file. See https://webpack.js.org/concepts#loaders
| import db from "@stardust/db";
| import * as authSchema from "@stardust/db/schema/auth";
> import { type BetterAuthPlugin, betterAuth } from "better-auth";
| import { drizzleAdapter } from "better-auth/adapters/drizzle";
| import { nextCookies } from "better-auth/next-js";

Import trace for requested module:
../../packages/common/auth/index.ts


> Build failed because of webpack errors

4:14 is the end of the type keyword.

I tried using ts-loader, which works (showing it's due to .ts) but I wasn't sure if it would interfere with the normal compilation process, and another webpack loader shouldn't be required for this.

Current vs. Expected behavior

Following the steps from the previous section, I expected the middleware to build, but instead it failed.

Provide environment information

Operating System:
  Platform: darwin
  Arch: arm64
  Version: Darwin Kernel Version 24.1.0: Thu Oct 10 21:02:45 PDT 2024; root:xnu-11215.41.3~2/RELEASE_ARM64_T8112
  Available memory (MB): 24576
  Available CPU cores: 8
Binaries:
  Node: 22.10.0
  npm: 10.9.0
  Yarn: 1.22.19
  pnpm: 9.4.0
Relevant Packages:
  next: 15.2.0-canary.47 // Latest available version is detected (15.2.0-canary.47).
  eslint-config-next: N/A
  react: 19.0.0-rc-66855b96-20241106
  react-dom: 19.0.0-rc-66855b96-20241106
  typescript: 5.5.4
Next.js Config:
  output: N/A

Which area(s) are affected? (Select all that apply)

Middleware

Which stage(s) are affected? (Select all that apply)

next build (local)

Additional context

I tested my app on 15.2.0-canary-47. NodeJS middleware support was introduced in .40, and there weren't any changes relating to normal SSR middleware since that release.