How to install and import @kbn/es-query

Hi There,

My project is using elastic search as the back-end service provider to do the searching, and for UI, we would like to leverage kibana by developing a new UI project and migrate some powerful components from kibana, such as filter bar, which relies on @kbn/es-query, so I need to import this module into my project.

but I cann't npm install @kbn/es-query successfully, since this module is not in npm registry. please advice.

Thanks!

The package is here https://github.com/elastic/kibana/tree/master/packages and there are instructions on how it can be use in the readme. But it's not available on npm.