OSX `nightly` build target is broken.
Probably related to the #16901 (moved) changes, but I didn't think to save the
build.log before going "fuck it, I know how to get the alpha target to build", sorry. 99% sure it was a configure time failure and not compile time though I may be wrong.
Since I have an alpha build going that I fully expect to succeed, I probably won't look into this further.