Import error with workspaces using yarn 2 (berry) PnP

[oscar-b]

Describe the bug

When setting up a CRA project with yarn workspaces, importing a library in the same workspace fails when using yarn 2 berry which has PnP mode by default.

Environment

Environment Info:

current version of create-react-app: 3.4.1
running from /Users/oscar/.config/yarn/global/node_modules/create-react-app

System:
OS: macOS 10.15.4
CPU: (8) x64 Intel(R) Core(TM) i5-8259U CPU @ 2.30GHz
Binaries:
Node: 10.15.3 - /usr/local/bin/node
Yarn: 2.0.0-rc.31 - /usr/local/bin/yarn
npm: 6.4.1 - /usr/local/bin/npm
Browsers:
Chrome: 80.0.3987.149
Firefox: 73.0.1
Safari: 13.1
npmPackages:
react: Not Found
react-dom: Not Found
react-scripts: Not Found
npmGlobalPackages:
create-react-app: Not Found

Steps to reproduce

See steps in repo: https://github.com/oscar-b/styled-pnp/commits/cra-berry-workspaces

Expected behavior

It should compile.

Actual behavior

$ yarn build
Creating an optimized production build...
Failed to compile.

./src/App.js
You attempted to import /Users/oscar/dev/test/styled-pnp/.yarn/$$virtual/lib-virtual-7d458e3583/1/lib which falls outside of the project src/ directory. Relative imports outside of src/ are not supported.
You can either move it inside src/, or add a symlink to it from project's node_modules/.

Reproducible demo

https://github.com/oscar-b/styled-pnp/commits/cra-berry-workspaces

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[oscar-b]

This is still relevant and needs triage.