Phaser Arcade Slopes ES6 help

[rocking]

I've been trying to get a ES6 version of a game together. I've had to shim Phaser (to get around a PIXI is undefined issue).

'use strict';

require('./../../dist/pixi');
require('./../../dist/phaser');
require('./../../dist/phaser-arcade-slopes');

module.exports = Phaser;

I've wanted to incorporate a plugin (phaser-arcade-slopes), so I attach it to Phaser in the Shim (see above). There seems to be an issue when I start to use it. I get:

SAT is undefined

This is a library phaser-arcade-slopes relies on.

Here is my code.

https://github.com/richardhealy/emagine

Should be pretty easy to setup.

nom install
npm run build-init
nom build

If you go to index.html, you'll see the error in the console.