Turbo requires a "packageManager" when it already has one

[fr0staman]

Summary

Hi!
I try integrate turbo in my monorepo.
So, turbo run build successfully works in my machine, but when build on Vercel, for some reason an error occurs (build error below)

But "packageManager": "yarn@4.1.0", already exist in my root package.json, see repo example link below.

Additional information

x could not resolve workspaces: We did not find a package manager
  | specified in your root package.json. Please set the "packageManager"
  | property in your root package.json (https://nodejs.org/api/
  | packages.html#packagemanager) or run `npx @turbo/codemod add-package-
  | manager` in the root of your monorepo.
  `-> We did not find a package manager specified in your root package.json.
      Please set the "packageManager" property in your root package.json
      (https://nodejs.org/api/packages.html#packagemanager) or run `npx
      @turbo/codemod add-package-manager` in the root of your monorepo.
Error: Command "turbo run build" exited with 1

Example

https://github.com/fr0staman/tamagui-react-native-i18next-zustand-starter

[anthonyshew]

What are your settings on your Vercel project?

[fr0staman]

Only stock settings, nothing has been changed

[fr0staman]

Any help?

[anthonyshew]

Sorry! GitHub notifications are terrible.

According to this page Yarn 4 does not appear to be supported on Vercel: https://vercel.com/docs/deployments/builds/package-managers#supported-package-managers

[fr0staman]

Thanks for trying!

Currently, I solved this problem by...

Overriding turbo run build to my standard build.
So, it works.
I don't downgraded yarn, just disabled turbo.

I'll be looking forward to improved support for Yarn v4!