Coding⏱️ 2 min read📅 2026-06-03

How to Fix: Error [ERR_PACKAGE_PATH_NOT_EXPORTED]: Package subpath './lib/tokenize' is not defined by "exports" in the package.json of a module in node_modules

Quick Answer: Check the package.json file to ensure that all subpaths are correctly defined in the "exports" section.

The error [ERR_PACKAGE_PATH_NOT_EXPORTED] occurs when a package's subpath is not defined in its `exports` field in the `package.json` file. This can happen if there are circular dependencies or missing exports between packages.

🛑 Root Causes of the Error

  • Circular dependencies between packages can cause this error.
  • Missing exports in a package's `package.json` file can lead to this issue.

🔧 Proven Troubleshooting Steps

Method 1: Update Package Exports

  1. Step 1: Open the `package.json` file of the affected package and update the `exports` field to include all subpaths.

Method 2: Use npm Publish

  1. Step 1: Run `npm publish` to rebuild the package and update its exports.

🎯 Final Words

To avoid this error, ensure that all subpaths are defined in the `exports` field of a package's `package.json` file. If you're experiencing issues with circular dependencies or missing exports, try updating the `exports` field or using `npm publish` to rebuild the package.

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