Xamarin.Forms-Samples/Xamarin.Forms-Behaviors/Entry Behavior/packages/repositories.config

<?xml version="1.0" encoding="utf-8"?>
<repositories>
  <repository path="..\Entry Behavior\Entry_Behavior.Android\packages.config" />
  <repository path="..\Entry Behavior\Entry_Behavior.iOS\packages.config" />
  <repository path="..\Entry Behavior\Entry_Behavior.WinPhone\packages.config" />
  <repository path="..\Entry Behavior\Entry_Behavior\packages.config" />
</repositories>