zappa deploy issue using python 3.8 instead of python 3.7

my virtualenv is using python3.7 and my zappa config also declares 3.7, but everytime i run zappa deploy its using python 3.8 instead of 3.7? really annoying any ideas?

FileNotFoundError: [Errno 2] No such file or directory: '/Users/ubuntu/myproject/venv/lib/python3.8/site-packages'