<!-- Important note: This repository is about Yarn 1.x, also called "Classic". We released Yarn 2 in January 2020, and multiple other minors since then (note that we slightly changed how Yarn is installed, hence why `npm install -g yarn` doesn't show 2.x if you run `--version`). If you get a problem with Yarn 1.x, it is *very* likely to have been fixed in higher versions. We recommand that you migrate when you get the chance: the process has been refined over the months and should be mostly painless - check here for details: https://yarnpkg.com/getting-started/migration#why-should-you-migrate If you hit blockers that aren't addressed in this guide, feel free to ask for help on our Discord community server, or our GitHub discussion forum: https://discord.com/invite/yarnpkg https://github.com/yarnpkg/berry/discussions Finally, if you intend to open a bug on Yarn 2, the right tracker is here: https://github.com/yarnpkg/berry If you decide to stay on Yarn 1 regardless, please be aware that we don't plan to merge pull requests or release future versions of Classic unless it's to solve an critical vulnerability report (which is unlikely). By contrast, the 2.x line is very actively supported. Thanks for your understanding! --> "Yarn --frozen-lockfile" is stuck in CI at "[4/4] Building fresh packages...", I have tried adding verbose flag (PFA), but i dont see any errors.  please share how to debug this? issue is due to some build script but unable to identify the source