[Qt-creator] make stalling on OSX

[Jason H]

I've got a pretty chronic problem of the latest creator stalling on OSX.
I'll hit the play button, it'll say:
10:30:17: Running steps for project winston...
10:30:17: Configuration unchanged, skipping qmake step.
10:30:17: Starting: "/usr/bin/make"

Then nothing. When I cancel the build using the red square, then it dumps a bunch of compiler output.

It goes through periods where 50% of make invocations are stalled.