I provide nightly Build for Ubuntu only.
I have two Ubuntu repositories, the first one for official releases and the other one for development purpose.
If you are using Ubuntu you may add the dev repo and get the latest version of under testing Rolisteam v1.8.
I provide that because one of my player has Ubuntu. So it is Best way.
But it requires Ubuntu 16.04.
I don't have the url of this repo because i m on my phone but i can give you tomorrow
Thanks for the interest you show to Rolisteam.