create-react-app (react-scripts 4.0.1) and react-map-gl (6.0.3)

Using create-react-app and the latest react-map-gl does not work.

Steps to reproduce

1. clone this repo
2. add mapbox API token to .env.local

REACT_APP_MAPBOX_TOKEN=<your mapbox token>

1. npm i
2. npm run build
3. npm i -g serve
4. npx serve -s build
5. open up http://localhost:5000, open up dev tools, notice errors

Uncaught ReferenceError: y is not defined
    at a915e7a2-d12d-45dc-b9bc-45bf5baa8c10:1
    at a915e7a2-d12d-45dc-b9bc-45bf5baa8c10:1
    at a915e7a2-d12d-45dc-b9bc-45bf5baa8c10:1