Migrating App Kit to Ember CLI - ReferenceError window is not defined

After discovering that Ember App Kit along with useage of Grunt are depricated now, I installed Ember CLI and tried to migrate a fresh copy of the App Kit to Ember CLI by running 'ember init', but I got this error 'ReferenceError: window is not defined at Object.'. I also ran 'npm install' and 'bower install' to get dependent modules, but still 'ember init' won't run. It seems that there's a problem with 'window' in 'config\environment.js'.

Rather than migrating the old App Kit, shouldn't we have a new starter kit based on Ember CLI?