Can't resolve typescript when using Yarn v2 with PlugNPlay

[johnwiseheart]

Current behavior

When upgrading to Yarn v2 with plug n play, Cypress tests and configuration which were previously working no longer work. Specifically, when running with debug mode, I see

  cypress:server:plugins resolving typescript with options { basedir: '/Users/john/<repo>' } +0ms
  cypress:server:plugins could not resolve typescript, error: Cannot find module 'typescript' from '/Users/john/<repo>' +9ms

even though typescript is present in the project.

I imagine this is probably because the node_modules directory no longer exists with pnp. However, I found https://github.com/cypress-io/cypress/blob/develop/packages/server/lib/util/ts-node.js, and tried using resolve.sync("typescript") myself, which seemed to work - so not sure why cypress is unable to resolve it.

Desired behavior

It should continue working with no issues.

Versions

Broken on 6.5.0, 6.6.0.

[jennifer-shehane]

Duplicate of #8008