How to resolve alias in Parceljs?

Question

I'm migrating from Webpack to Parcel and I use folder aliases like this in my component:

import * as authActions from 'actions/authActions';

I get this error: Cannot find module 'actions/authActions'

The weird thing is, it only shows when using build, it works in development mode but not in production.

I've set up my aliases in package.json like the docs say:

{
  "scripts: {
      "build-client": "parcel build client/index.html dist/client",
      "build-server": "parcel build server/index.js --target node -d dist/server",
      "build-test": "yarn build-server && node ./dist/server/index.js"
  },
  "alias": {
      "actions": "./client/actions"
  }
}

It's a server-side rendered app, I'm importing the component in different places and I can't use the default Parcel root, because it's relative to the entry file.

How can I get this to properly resolve aliases?