how to build a 3rd party package in ember v2.6

Trying to integrate vega-lite npm package into a single component for ember 2.6 .Brocolli is giving following error:

The Broccoli Plugin: [object Object] failed with: Error: Cannot find module 'vega-lite' from '/home/zemoso012/gg/ember-trello/tmp/stub_generator-output_path-A3jgYyCP.tmp'