OK, you’re right, this looks like a different error - if there had been issues with the licence, errors would have been produced much earlier in the process. Only when it runs Qt’s qmake command does it produce this error:
A quick search for this error shows that this is a problem with Qt when building with XCode 8, as reported here and here - nothing to do with XCode as such. There are suggestions on how to fix this on these posts, hopefully they will sort out the problem.
I’m afraid there is nothing we can do to avoid such issues in packages we depend on, unfortunately. It seems Apple have changed the way XCode behaves, and Qt hasn’t been updated to match (although I guess that will be fixed pretty quickly). The one thing we could do is provide pre-compiled packages, which is something we’ve been talking about doing for some time. Maybe we’ll look into it if we find the time. Of course, if anyone is willing to help out on this front, I’m sure there’ll be lots of very grateful users out there… 