Does Vercel support Yarn 4?

Yarn 4 is supported. See Yarn 4's usage guide to get started.

For Vercel to detect and use Yarn 4 instead of Yarn 1, do one of the following:

• enable Corepack for your project
• add yarn to .yarn/releases with yarn set version 4.7.0 --yarn-path

If you find bugs or would like to request further support of Yarn 4, please submit feedback here.