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Project broken on Yarn v2

See original GitHub issue

🐛 Bug Report

When on Yarn 2, I get this error when trying to run yarn start:

/workspace/Cherry/website/.pnp.js:28332
    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: @babel/runtime (via "@babel/runtime/helpers/interopRequireDefault")
Required by: react-loadable-ssr-addon@virtual:ebd7b9259ecd2093755e637a1fd861d705df40e70f047e72ef912a060f6f8b0d7d8b754ceeb087469fa51421c9654efe3ad7ba9d5fbe846f41f5175c740dcb64#npm:0.2.3 (via /workspace/Cherry/website/.yarn/$$virtual/react-loadable-ssr-addon-virtual-3a33825c47/0/cache/react-loadable-ssr-addon-npm-0.2.3-26d8c8d441-1.zip/node_modules/react-loadable-ssr-addon/lib/)

Require stack:
- /workspace/Cherry/website/.yarn/$$virtual/react-loadable-ssr-addon-virtual-3a33825c47/0/cache/react-loadable-ssr-addon-npm-0.2.3-26d8c8d441-1.zip/node_modules/react-loadable-ssr-addon/lib/index.js
- /workspace/Cherry/website/.yarn/$$virtual/@docusaurus-core-virtual-ebd7b9259e/0/cache/@docusaurus-core-npm-2.0.0-alpha.58-2f04b5f6f0-1.zip/node_modules/@docusaurus/core/lib/commands/build.js
- /workspace/Cherry/website/.yarn/$$virtual/@docusaurus-core-virtual-ebd7b9259e/0/cache/@docusaurus-core-npm-2.0.0-alpha.58-2f04b5f6f0-1.zip/node_modules/@docusaurus/core/lib/index.js
- /workspace/Cherry/website/.yarn/$$virtual/@docusaurus-core-virtual-ebd7b9259e/0/cache/@docusaurus-core-npm-2.0.0-alpha.58-2f04b5f6f0-1.zip/node_modules/@docusaurus/core/bin/docusaurus.js
    at Object.makeError (/workspace/Cherry/website/.pnp.js:20077:24)
    at resolveToUnqualified (/workspace/Cherry/website/.pnp.js:28940:35)
    at resolveRequest (/workspace/Cherry/website/.pnp.js:29017:27)
    at Object.resolveRequest (/workspace/Cherry/website/.pnp.js:29085:26)
    at Function.module_1.Module._resolveFilename (/workspace/Cherry/website/.pnp.js:28315:34)
    at Function.module_1.Module._load (/workspace/Cherry/website/.pnp.js:28200:40)
    at Module.require (internal/modules/cjs/loader.js:1026:19)
    at require (internal/modules/cjs/helpers.js:72:18)
    at Object.<anonymous> (/workspace/Cherry/website/.yarn/$$virtual/react-loadable-ssr-addon-virtual-3a33825c47/0/cache/react-loadable-ssr-addon-npm-0.2.3-26d8c8d441-1.zip/node_modules/react-loadable-ssr-addon/lib/index.js:3:30)
    at Module._compile (internal/modules/cjs/loader.js:1138:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1158:10)
    at Module.load (internal/modules/cjs/loader.js:986:32)
    at Function.module_1.Module._load (/workspace/Cherry/website/.pnp.js:28230:14)
    at Module.require (internal/modules/cjs/loader.js:1026:19)
    at require (internal/modules/cjs/helpers.js:72:18)
    at Object.<anonymous> (/workspace/Cherry/website/.yarn/$$virtual/@docusaurus-core-virtual-ebd7b9259e/0/cache/@docusaurus-core-npm-2.0.0-alpha.58-2f04b5f6f0-1.zip/node_modules/@docusaurus/core/lib/commands/build.js:16:52) {
  code: 'MODULE_NOT_FOUND',
  pnpCode: 'UNDECLARED_DEPENDENCY',
  data: {
    request: '@babel/runtime/helpers/interopRequireDefault',
    issuer: '/workspace/Cherry/website/.yarn/$$virtual/react-loadable-ssr-addon-virtual-3a33825c47/0/cache/react-loadable-ssr-addon-npm-0.2.3-26d8c8d441-1.zip/node_modules/react-loadable-ssr-addon/lib/',
    issuerLocator: {
      name: 'react-loadable-ssr-addon',
      reference: 'virtual:ebd7b9259ecd2093755e637a1fd861d705df40e70f047e72ef912a060f6f8b0d7d8b754ceeb087469fa51421c9654efe3ad7ba9d5fbe846f41f5175c740dcb64#npm:0.2.3'
    },
    dependencyName: '@babel/runtime',
    candidates: [ 'react-loadable-ssr-addon', 'react-loadable', 'webpack' ]
  },
  requireStack: [
    '/workspace/Cherry/website/.yarn/$$virtual/react-loadable-ssr-addon-virtual-3a33825c47/0/cache/react-loadable-ssr-addon-npm-0.2.3-26d8c8d441-1.zip/node_modules/react-loadable-ssr-addon/lib/index.js',
    '/workspace/Cherry/website/.yarn/$$virtual/@docusaurus-core-virtual-ebd7b9259e/0/cache/@docusaurus-core-npm-2.0.0-alpha.58-2f04b5f6f0-1.zip/node_modules/@docusaurus/core/lib/commands/build.js',
    '/workspace/Cherry/website/.yarn/$$virtual/@docusaurus-core-virtual-ebd7b9259e/0/cache/@docusaurus-core-npm-2.0.0-alpha.58-2f04b5f6f0-1.zip/node_modules/@docusaurus/core/lib/index.js',
    '/workspace/Cherry/website/.yarn/$$virtual/@docusaurus-core-virtual-ebd7b9259e/0/cache/@docusaurus-core-npm-2.0.0-alpha.58-2f04b5f6f0-1.zip/node_modules/@docusaurus/core/bin/docusaurus.js'
  ]
}

Have you read the Contributing Guidelines on issues?

Yup

To Reproduce

Create D2 project with Yarn 2, then run yarn start

Expected behavior

It starts

Actual Behavior

See stacktrace above

Your Environment

Docusaurus version used: v2 beta (latest)
Environment name and version (e.g. Chrome 78.0.3904.108, Node.js 10.17.0): Node 12.18.1 on Linux
Operating system and version (desktop or mobile): Gitpod