Hi @jmernster,
Thanks for the reply. That’s interesting… Perhaps there was some transitional code in Sierra that allows it to work. Will try to get this fixed permanently, but in the meantime, I can only suggest disabling SIP, making the symlink, enabling SIP, rebooting and trying to build again.
I suppose this should have the advantage that it will work with the stock PyPi packages, but hopefully we will come up with a proper solution in the very near future.
Many thanks,
Ellis