Build on win 10 x64 for python 3.8 fails

Hi, I have to compile snips-nlu-ontology for windows 10 x64 and python 3.8. I have rust installed on my system and I can compile snips-nlu and snips-nlu parsers successfully. But snips-nlu-ontology fails. If I read the log correctly, the first occuring error is:

`error: could not compile `snips-nlu-ontology-ffi-macros``

Does this package require another compiler/binary? 