I believe it's no longer the case. The maintainer of Cppyy was cautioning that the Python 3 support was somewhat experimental at the time, but I believe it's of

I believe it's no longer the case. The maintainer of Cppyy was cautioning that the Python 3 support was somewhat experimental at the time, but I believe it's officially supported now. Either way, it could have been solved by building from source, but I was feeling lazy :)