Node.js 20 + Yarn 1 (Classic): Runs but Yarn 1 Is in Maintenance Mode
Node.js 20+Yarn 1 (Classic)
Yarn 1.x requires Node ≥ 4.0.0; Node.js 20 satisfies this. Yarn 1 is technically functional on Node 20, but Yarn 1 has been in maintenance-only mode since 2020 and receives no new features. Migrating to Yarn 4 or another package manager is recommended.
Workarounds & Fixes
Migrate to Yarn 4 using Corepack: `corepack enable && yarn set version stable`