A ha!
In the FAQ section ...
Q - I have the WP8 SDK and I installed the NuGet package, it still installs the 7.1 build version of the toolkit, or I get an error: "You are trying to install this package in a project designed for WindowsPhone, Version = v8.0 ', but the package does not contain references to assemblies that are compatible with this infrastructure.
A β You have an older version of NuGet. Install the latest NuGet from www.NuGet.org . Close and restart all the instances of Visual Studio. Now install the package. It will install correctly. WP8 projects are supported from Nuget 2.1 onwards.
After that go to the xaml page type
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