Unable to assign ng-controller to ion-nav-view (1.3.1)

I’m trying to assign an ng-controller attribute to an ion-nav-view, but for some reason it doesn’t seem to ever hit my controller. Is there something on the ion-nav-view directive that prevents this? I’m pretty new to Angular, so maybe I’m just doing or understanding something incorrectly. Here’s a codepen where I try to attach my NavViewController to the root ion-nav-view (but doesn’t seem to run the controller): http://codepen.io/anon/pen/WxYYkN

Any ideas?