Unreal Engine 4 is available for Win10 UWP app dev now

I can build and run from within Visual Studio 2015, but when I try to create a package from within UE, I get the following error -


UATHelper: Packaging (UWP (x86-32bit)): MSBuild: UWPPlatform.Automation.cs(214,63): error CS0234: The type or namespace name 'Tools' does not exist in the namespace 'Microsoft' (are you missing an assembly reference?) ...\engine\Engine\Source\Programs\AutomationTool\UWP\UWP.Automation.csproj]

Any thoughts?