How to make EUI part of Kibana packages?

Elastic Stack Kibana
8

I did try to remove/resolve the dependency versions, though major version changes such as

sass-loader
          ^10.0.1 => @elastic/eui
          ^8.0.2 => @kbn/interpreter, @kbn/optimizer, @kbn/ui-framework, x-pack
        style-loader

would produce issues. I observe yarn build does not work.
Publishing forked eui is our last resource, seems like it has to be.

Thank you all for your responses.