Node.js >= 0.10 is required!
Edit file Gruntfile.js and modify the following two lines to match your development environment:
var foswikiBase = grunt.option('foswiki') || '/opt/qwiki';
var checkoutBase = grunt.option('git') || '/opt/git';
Exec:
npm install && bower install && grunt install
Ensure Grunt is running while you are editing any .scss or .js file.