Error4 reports
Fix TurbopackInternalError
in Next.js
✅ Solution
TurbopackInternalError generally arises from problems with file system access, particularly issues with symlinks, incorrect paths, or restricted permissions during the build process. Ensure your project's file paths, including outputFileTracingRoot, are valid and accessible, and that symlinks within your `node_modules` or project directory are correctly resolved and do not point outside of the project root; consider using the `realpath` command to normalize paths. If using Windows, verify adequate permissions for file operations and consider disabling developer mode or enabling long path support if symlink creation faces issues.
Related Issues
Real GitHub issues where developers encountered this error:
Turbopack build fails with symlinked node_modules: "Symlink node_modules is invalid, it points out of the filesystem root"Jan 9, 2026
TurbopackInternalError when outputFileTracingRoot path is invalidDec 29, 2025
[TurbopackInternalError] Build fails on Windows with Prisma symlink error (os error 1314)Dec 23, 2025
Failed to load external module styled-components after updating to version 16.1.0Dec 23, 2025
Timeline
First reported:Dec 23, 2025
Last reported:Jan 9, 2026