new URL(”...” , import.meta.url) to get the path, but the file contents are unintentionally loaded at build time.

[yskszk63]

Link to the code that reproduces this issue

https://github.com/yskszk63/nextjs-unexpected-js-eval

To Reproduce

1. npm run build

Current vs. Expected behavior

Current

$ npm run build

> build
> next build

   ▲ Next.js 15.2.0-canary.13

   Creating an optimized production build ...
 ✓ Compiled successfully
 ✓ Linting and checking validity of types    
 ✓ Collecting page data    
Error occurred prerendering page "/". Read more: https://nextjs.org/docs/messages/prerender-error
Error: 🙈
    at Object.<anonymous> (/home/yskszk63/work/nextjs-unexpected-js-eval/node_modules/throw-error-on-load/throw.js:1:7)
    at Module._compile (node:internal/modules/cjs/loader:1566:14)
    at Object..js (node:internal/modules/cjs/loader:1718:10)
    at Module.load (node:internal/modules/cjs/loader:1305:32)
    at Function._load (node:internal/modules/cjs/loader:1119:12)
    at TracingChannel.traceSync (node:diagnostics_channel:322:14)
    at wrapModuleLoad (node:internal/modules/cjs/loader:220:24)
    at Module.<anonymous> (node:internal/modules/cjs/loader:1327:12)
    at mod.require (/home/yskszk63/work/nextjs-unexpected-js-eval/node_modules/next/dist/server/require-hook.js:65:28)
    at require (node:internal/modules/helpers:136:16)
Export encountered an error on /page: /, exiting the build.
 ⨯ Static worker exited with code: 1 and signal: null

Expected behavior

The build completes successfully.

Provide environment information

Operating System:
  Platform: linux
  Arch: x64
  Version: #1 SMP PREEMPT_DYNAMIC Fri, 10 Jan 2025 00:39:41 +0000
  Available memory (MB): 30844
  Available CPU cores: 16
Binaries:
  Node: 23.4.0
  npm: 11.0.0
  Yarn: N/A
  pnpm: N/A
Relevant Packages:
  next: 15.2.0-canary.13 // Latest available version is detected (15.2.0-canary.13).
  eslint-config-next: N/A
  react: 19.0.0
  react-dom: 19.0.0
  typescript: 5.7.3
Next.js Config:
  output: N/A

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

Module Resolution

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

next dev (local), next build (local)

Additional context

I want to get the path of an asset after build, but unintentionally the specified file is loaded.

Removing serverExternalPackages from next.config.ts works as expected.

[yskszk63]

The throw-error-on-load module used in the reproduced code was created to reproduce this case.
It simply throws an error when loaded.