Grunt Build Error: require.js blocks are no more supported

When I use Yo to test Backbone webapp, I get thie error:
Running "useminPrepare:html" (useminPrepare) task Fatal error: require.js blocks are no more supported.
According to the discuss in grunt-usemin, I update Gruntfile.js with requirejs.dis.options:

Insert the following options:
, include: '../bower_components/requirejs/require', mainConfigFile: + '/scripts/main.js', out: yeomanConfig.dist + '/scripts/app.min.js'

Then update index.html in app category from
&lt;!-- build:js scripts/main.js --&gt; &lt;script data-main="scripts/main" src="bower_components/requirejs/require.js"&gt;&lt;/script&gt; &lt;!-- endbuild --&gt; &lt;/code&gt; to <code> &lt;!-- REMOVE THIS AFTERgrunt build` –>
<script data-main=”scripts/config” src=”bower_components/requirejs/require.js”></script>

&lt;!-- UNCOMMENT THIS AFTER `grunt build` --&gt;
&lt;!-- &lt;script src="scripts/app.min.js"&gt;&lt;/script&gt; --&gt;


The problem should be resolved.

And after build app to dist category, don’t forget to change index.html, use app.min.js to replace requirejs/require.js.