For the Maqetta application that we host at Maqetta.org, creating a "product" is quite a complicated thing and I'm not the expert on how that is all done with our most recent code. We have complex build scripts that changed dramatically in the past month or two. I suspect that the scripts that set off product builds are in releng/davinci.releng, and probably the file that launches it all is releng/davinci.releng/build.sh.
Other Maqetta team members, is that correct? Anything else other people can add to help?