Project builds fine with public binaries, fails with my own build of Qt. (5.2.1)

I’m trying to track down a crash in the EventLoop thread that occurs on termination, so I’m trying to build a debug version of Qt with source etc that I can debug and then fix (if necessary). I can build fine with the over the web installed version of Qt (this is on OSX) – but I get the following error when I build against the version of Qt that I built from the Src directory that came with 5.2.1 Project ERROR: Unknown module(s) in QT: declarative quick qml multimedia Is there some other configure arguments I need to pass to get these modules included? Or an I not installing correctly? (sudo make install).