Brocfile.js

var pickFiles = require('broccoli-static-compiler');
var foundation = pickFiles('bower_components/foundation/scss/foundation', {
    srcDir: '/',
    files: ['**/*'],
    destDir: '/assets/foundation'
});
var mergeTrees = require('broccoli-merge-trees');

module.exports = mergeTrees([app.toTree(), foundation], {
    overwrite: true
});