Trouble implementing ember-cli-mixpanel

I'm a backend dev trying to wrap my head around the brave new world of javascript MVC frontends. I'm building a simple Ember-cli application (v1.12 for the moment) and I'm trying to integrate mixpanel via the ember-cli-mixpanel addon (v0.0.3).

I've installed it via ember install ember-cli-mixpanel, so I've got it in my node_modules directory and correctly referenced in my packages.json.

The docs are a little sparse for a newb, but I read this:

There is one manual step, which includes our wrapper in your Router. Just extend your Router with tracking_mixin.js.

to mean that I need to have this line in my app's router.js:

import TrackingMixin from './mixin/tracking_mixin';

However, when the app goes to load, this is thrown in my console:

Uncaught TypeError: this.trackRouteChange is not a function

trackRouteChange is a stock pageview event tracker being called from the mixin, so I think that means that it's loaded properly... but I'm not sure about that.

I do have my environment.js properly set up with the mixpanel config stuff in there:

mixpanel: {

enabled: true,

LOG_EVENT_TRACKING: true,

token: 'supersecrettokenhere',

disable_auto_tracking: false

},

Any insight would be greatly appreciated. I'm sure it's something simple but after banging on this for a while now, I think I'm just hitting a block.