How to Troubleshoot “legacy-install-failure” Error in Yarn

error: legacy-install-failure

If you are using Yarn as your package manager for your JavaScript projects, you may encounter various errors while installing packages. One of the common errors that Yarn users face is the “legacy-install-failure” error. This error can occur for various reasons, such as network issues, permission issues, or outdated dependencies. In this article, we’ll discuss how to troubleshoot this error and get your package installation back on track.

Check Your Network Connection

The first step in troubleshooting the “legacy-install-failure” error is to check your network connection. Yarn relies on a stable network connection to download and install packages, and any disruptions in your connection can cause the error to occur. Check your network settings and ensure that your internet connection is stable. You can also try switching to a different network to see if that resolves the issue.

Update Yarn and Node.js

Outdated versions of Yarn and Node.js can also cause the “legacy-install-failure” error. Make sure that you are using the latest versions of both Yarn and Node.js by running the following commands:

yarn self-update
nvm install --lts

This will update Yarn to the latest version and install the latest LTS version of Node.js using nvm.

Check Your Package.json File

The “legacy-install-failure” error can also occur if there are issues with your package.json file. Check that the file is properly formatted and that all dependencies and versions are correctly listed. You can also try running the following command to check for any issues with your package.json file:

yarn check

This command will scan your package.json file and report any issues.

Clear Yarn Cache

The Yarn cache stores data from previous package installations and can sometimes cause issues when installing new packages. Try clearing the Yarn cache by running the following command:

yarn cache clean

This will clear the cache and may resolve the “legacy-install-failure” error.

Check Your Yarn Configuration

The Yarn configuration file can also cause issues when installing packages. Check that your Yarn configuration is correct by running the following command:

yarn config list

This command will display your Yarn configuration settings. Check that the settings are correct and make any necessary changes.


The “legacy-install-failure” error can be frustrating to deal with, but there are various steps you can take to troubleshoot and resolve the issue. By checking your network connection, updating Yarn and Node.js, checking your package.json file, clearing the Yarn cache, and checking your Yarn configuration, you can identify and resolve the underlying cause of the error. If you are still having issues after trying these steps, don’t hesitate to seek help from the Yarn community.

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