# Build fails:  error yargs@17.2.0: The engine "node" is incompatible with this module. Expected version ">=12". Got...

You are building with an unsupported Node version. The Firebase JS SDK build needs a supported Node release, not Node 10; the guidance in the thread pointed to Node 16 LTS. Switch Node versions and rebuild.

## Context from the issue
gh:firebase/firebase-js-sdk#7042: Issue firebase/firebase-js-sdk#7042 (closed, 14 comments): <!-- Step 1 [READ THIS] -->
<!--

Are you in the right place?
  * For issues or feature requests related to __the code in this repository__
    file a Github issue.
    * If this is a __feature request__ make sure the issue title starts with "FR:".
  * For general technical questions, post a question on [StackOverflow](http://stackoverflow.com/)
    with the firebase tag.
  * For general Firebase discussion, use the [firebase-talk](https://groups.google.com/forum/#!forum/firebase-talk)
    google group.
  * For help troubleshooting your application that does not fall under one
   ...