Faust plugin builder - cv in/out?

Is CV working in the Faust plugin builder (MOD Cloud Builder)? Control Voltage isn’t listed in the Plugin Category list. Just thought it worth asking since I’m not having much luck getting CV outputs with a signal analysis → CV plugin I’m trying to write. If Faust CV should work, I’ll keep trying. (Any hints are welcome - could it be to do with not having a full Mod gui? None of the “sardine can” CV plugins I’ve tried from the beta store so far work).