After several months of work, the Polylith Team has released a big update of the Polylith tool that is based on tools.dep. Everything else is also updated, including the logo that has been simplified!
High level documentation: http://polylith.gitbook.io
The new tool: http://github.com/polyfy/polylith
How to migrate to the new tool: https://github.com/tengstrand/lein-polylith/blob/master/migrate/migrate.md
The RealWorld example app: http://github.com/furkan3ayraktar/clojure-polylith-realworld-example-app