IMPORTANT ANNOUNCEMENT don’t install the new version of Visual Studio 2017 (15.3). It seems Microsoft broke their own MS Build API and because of that you might not be able to build any Xenko project anymore.
It also ships with a newer version of Xamarin that we haven’t tested yet.
The issue has been identified by Microsoft team and there are working on a fix (see https://github.com/Microsoft/msbuild/issues/2369). While we wait for them to release a fix, I’m currently working on a workaround that hopefully will fix it for most users.