I spoke with the team today.
A FAQ for all of this is on the radar, but everything is still early at the moment.
**The project isn’t designed to be built on the Xbox SDK, so it should build for UWP. **
In order to build for UWP, the project settings must be configured so that the build process can generate a valid AppX manifest. To do so,
• Open up the Project Settings window.
• Open up the Description page.
• Make sure the page is filled out completely, including project name, company name, and company distinguished name.
• Open up the UWP page.
• Make sure all required images are provided.
More to come!