Prerequisites checklist

• I have read the contributing guidelines.

What is the purpose of this pull request?

The yarn-install job in the workflow .github/workflows/ci-build-all-pm.yml relies on a version of Corepack bundled with Node.js. The Node.js website https://nodejs.org/docs/latest/api/corepack.html states "... Corepack itself will no longer be distributed with future versions of Node.js." which would cause the workflow to break.

Yarn > Installation now recommends using

npm install -g corepack

What changes did you make? (Give an overview)

In the workflow .github/workflows/ci-build-all-pm.yml, add npm install -g corepack@latest before using Corepack in the job yarn-install.

Note that although a global install of Corepack currently automatically enables Corepack, the explicit command to enable Corepack is retained in the workflow in case a future release of Corepack changes this undocumented default.

Related Issues

• contributes to closure of issue Change Request: Migrate Build install to Corepack standalone #104

Is there anything you'd like reviewers to focus on?

Check that https://github.com/eslint/css/actions/workflows/ci-build-all-pm.yml completes successfully