My bad @zeroability I meant built separately on local on both machine, working with Kwin (X11) from OM Rocks 6 and Kwin (Xlibre) from OM Rome 6. I didn’t built Xlibre on Rocks for sure 
Looking at the other post on the forum explained by @rugyada Barrier still exists on the other (non free?) repo :
Tested with my current config as well, it works actually. For X users like me, Barrier is actually still solid 