Grunt cdnify issue with nested bower folder

I'm trying to cdnify the jquery library using grunt-google-cdn, but my bower_components folder is in a nested folder: app/shared/bower_components.

The grunt task is running, but creating this kind of link:

original line in app/index.html:

<script src="shared/bower_components/jquery/dist/jquery.js"></script>

line in output dist/index.html:

<script src="shared//http://ift.tt/1vhyxae"></script>

In my gruntfile:

cdnify: {
  dist: {
    html: ['dist/*.html']
  }
},...

And the content of .bowerrc:

{
  "directory" : "app/shared/bower_components"
}