Xamarin.Forms-Samples/Xamarin.Forms-Styles/packages/repositories.config

<?xml version="1.0" encoding="utf-8"?>
<repositories>
  <repository path="..\Xamarin Styles\Xamarin_Styles.Android\packages.config" />
  <repository path="..\Xamarin Styles\Xamarin_Styles.iOS\packages.config" />
  <repository path="..\Xamarin Styles\Xamarin_Styles.WinPhone\packages.config" />
  <repository path="..\Xamarin Styles\Xamarin_Styles\packages.config" />
</repositories>