Karma / Ember.js / Node / PhantomJS / QUnit ... "ReferenceError: Can't find variable: define"

Trying to get Karma up and running on Mac OS to test an ember.js app, but stuck on the very beginning on the process...

INFO [karma]: Karma v0.12.31 server started at http://localhost:9876/
INFO [launcher]: Starting browser PhantomJS
INFO [PhantomJS 1.9.8 (Mac OS X)]: Connected on socket t5A0KHzhltzouM8k0KD_ with id 32158091
PhantomJS 1.9.8 (Mac OS X) ERROR
ReferenceError: Can't find variable: define at/Users/jroig/development/PartnerControlPanel/module/Application/src/Clientside/js/app.js:57

Node -v output

v0.10.35

... anyone have any ideas?