Cannot use grunt on simple Yeoman angular

Question

Trying to just startup a simple angular app via Yeoman, using steps in this guide http://www.sitepoint.com/kickstart-your-angularjs-development-with-yeoman-grunt-and-bower/

Answer 1

Installed "load-grunt-tasks" module locally

ie

npm install load-grunt-tasks

instead of

npm install -g load-grunt-tasks