Question about SASS support.

If I follow the official SASS directions at
https://github.com/facebookincubator/create-react-app/blob/master/packages/react-scripts/template/README.md#adding-a-css-preprocessor-sass-less-etc

It seems as though scss files are still not able to be imported.

Is this some thing that should just work, or is ejecting still required if I want to use create-react-app-ts.

Thanks,