Yarn v2, missing dependencies

[Banou26]

Intended outcome:

Trying to use yarn v2 with apollo should work

Actual outcome:

C:\dev\oz\.pnp.js:18050
    throw firstError;
    ^

Error: A package is trying to access another package without the second one being listed as 
a dependency of the first one

Required package: graphql (via "graphql")     
Required by: @apollographql/apollo-tools@npm:0.4.1 (via /C:/dev/oz/.yarn/cache/@apollographql-apollo-tools-npm-0.4.1-b40a6f7b18-1.zip/node_modules/@apollographql/apollo-tools/lib/utilities/graphql.js)

    at internalTools_makeError (C:\dev\oz\.pnp.js:17836:24)
    at resolveToUnqualified (C:\dev\oz\.pnp.js:18804:19)
    at resolveRequest (C:\dev\oz\.pnp.js:18881:27)
    at Object.resolveRequest (C:\dev\oz\.pnp.js:18964:26)
    at Function.external_module_default.a._resolveFilename (C:\dev\oz\.pnp.js:18041:29)     
    at Function.external_module_default.a._load (C:\dev\oz\.pnp.js:17943:50)
    at Module.require (internal/modules/cjs/loader.js:1016:19)
    at require (internal/modules/cjs/helpers.js:69:18)
    at Object.<anonymous> (C:\dev\oz\.yarn\cache\@apollographql-apollo-tools-npm-0.4.1-b40a6f7b18-1.zip\node_modules\@apollographql\apollo-tools\src\utilities\graphql.ts:1:1)
    at Module._compile (internal/modules/cjs/loader.js:1121:30) {
  code: 'MODULE_NOT_FOUND',
  pnpCode: 'UNDECLARED_DEPENDENCY',
  data: {
    request: 'graphql',
    issuer: '/C:/dev/oz/.yarn/cache/@apollographql-apollo-tools-npm-0.4.1-b40a6f7b18-1.zip/node_modules/@apollographql/apollo-tools/lib/utilities/graphql.js',
    issuerLocator: { name: '@apollographql/apollo-tools', reference: 'npm:0.4.1' },
    dependencyName: 'graphql',
    candidates: [ '@apollographql/apollo-tools', 'apollo-env' ]
  }
}

How to reproduce the issue:

Make a project that just tries to import apollo-server and it'll throw the error.
package.json

{
  "name": "test",
  "scripts": {
    "dev": "node index.js"
  },
  "dependencies": {
    "apollo-server": "^2.9.12"
  }
}

index.js

require('apollo-server')

Versions
apollo-server@2.9.12
yarn@2.0.0-rc.12
node@v13.2.0

[danbalarin]

You need to have latest yarn version (yarn@2.0.0-rc.29) to enable packageExentions feature.

Then add this into the .yarnrc.yml file:

packageExtensions:
    '@apollographql/apollo-tools@*':
        dependencies:
            'graphql': '*'

# Might need to add this as well
    ws@*:
        dependencies:
            'bufferutil': '*'
            'utf-8-validate': '*'

and run yarn in the root of your project

See more at https://yarnpkg.com/advanced/migration#a-package-is-trying-to-access-another-package-