12:22 <mattock> I'd need to start a particular build (or builds) first, followed by others. I tested the build/builder priority functions but those did not seem to work as expected. The nextBuild setting in the builder configuration seems to work as advertised, but it does not make any particular build launch first. Any hints/pointers?

13:14 <mattock> it seems that "Dependent Scheduler" (https://docs.buildbot.net/latest/manual/configuration/schedulers.html#dependent-scheduler) is what I'd need