Node-sass not found (tho using sass) with Yarn 2

Bug report

Describe the bug

Trying to import scss file and but got an error:

Error: sass-loader tried to access node-sass (a peer dependency) but it isn't provided by its ancestors; this makes the require call ambiguous and unsound.

next.config.js

module.exports = {
  sassOptions: {
    implementation: require('sass'),
  },
}

The bug doesn’t appear if I use npm instead of yarn v2 or/and if node version is 12.18.0 instead of 14.4.0.

To Reproduce

1. Manually create nextjs project
2. Use node 14.4.0 and yarn v2
3. Add next.config.js like above
4. Install sass with yarn v2
5. Import scss file
6. Run yarn dev

Expected behavior

Run without error by using dart-sass implementation.

System information

• OS: OSX 10.15.5 (19F101)
• Version of Next.js: 9.4.4
• Version of Node.js: 14.4.0

Additional context

Using typescript and yarn v2 workspaces, but I think that’s not the case.

[chrisands]

I’ll try to do this next week.

[Timer]

We really need to add proper Yarn 2 E2E tests to the Next.js repo so we don’t keep regressing on these features! Could you try to write that test suite?