# 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] -->
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