storybook-yarn-berry-monorepo

Repro case for: Yarn v2 monorepo + Storybook with custom webpack config (for SASS support)

storybookjs/storybook#9527 (comment)

Steps

• Clone repo

• Install dependencies

yarn install

• Start storybook

yarn workspace my-lib storybook

Error: @storybook/core tried to access sass-loader

Module not found: Error: @storybook/core tried to access sass-loader, but it isn't declared in its dependencies; this makes the require call ambiguous and unsound.

Required package: sass-loader (via "sass-loader")
Required by: @storybook/core@npm:6.1.0-alpha.34 (via /Users/jonjon/tmp/storybook-yarn-berry-monorepo/.yarn/cache/@storybook-core-npm-6.1.0-alpha.34-a93cd16488-2d6e16aa2a.zip/node_modules/@storybook/core/)

Installing sass-loader and sass at the root of the project makes the error go away:

yarn add -D sass-loader sass