XamlSamples doesn't compile w/Xamarin Studio & iOS

When I attempt to compile XamlSamples I get the following compiler error:

    AppDelegate.cs(20,37): error CS0234: The type or namespace name `App' does not exist in the namespace `XamlSamples'. Are you missing an assembly reference?

Steps to reproduce:

1. Running on OS X Yosemite 10.10.4
2. Download XamlSamples: https://developer.xamarin.com/samples/xamarin-forms/XAMLSamples/
3. Open the solution in Xamarin Studio (5.9.4 build 5)
4. Make sure packages are up to date (1.4.3.6376)
5. Set XamlSamples.iOS as the start-up project.
6. Compile, you will get the compiler error above, although if you try to auto-complete XamlSamples.App it works.

Could I be doing something wrong here?