Use Babel instead.
broccoli-regenerator 
Transpile ES2015 generator functions to ES5 with Regenerator
Issues with the output should be reported on the Regenerator issue tracker.
$ npm install --save-dev broccoli-regenerator
var regenerator = require('broccoli-regenerator');
tree = regenerator(tree, options);Type: boolean
Default: false
A small runtime library (less than 1KB compressed) is required to provide the wrapGenerator function. You can install it either as a CommonJS module or as a standalone .js file, whichever you prefer.
MIT © Sindre Sorhus