I’ll try to keep in the back of my mind to enable that device in 1.15 by default if it seems to work ok

Also I know the documentation is scattered, but I did mention the python thing here
https://github.com/ericpaulbishop/gargo ... requisites
Well done on persisting and getting the right outcome.
One more thing I’ll note for anyone else reading. The automatic use all cpu cores code wasn’t working a while ago, and thanks to a helpful contributor it now is. The downside is that if a build fails, it is often impossible to figure out what went wrong because output messages are in a jumbled order.
If a build fails, i would recommend starting it again immediately with “BUILD_THREADS=1” which should make the failure more clear. It will be significantly slower.