Stable and or Daily Build System - Alexmitter/osu-lazer-linux-installer GitHub Wiki
The Daily system replaces the current system and works as you expect it from previous versions.
So we will focus on the new Stable Build System.
Choose Clone and Compile osu!lazer

Select Stable

Select one of the preset versions or Manual

If you select Manual, input a commit hash from the osu!lazer repo
