It turns out, Chris Knight had already figured out what to do.
A couple of notes:
- I downloaded Xcode 5.0.1 from the App Store (h/t 9to5mac)
- I prefer to build things as a regular user, and reserve sudo for the make install step.
First impressions … Well, I can finally feel good about having put 16 GB on this clunker of a MacBook Pro ;-) Activity monitor is showing 11 GB in use as I go through reinstalling the ports: