UnifiedAPI project not build against currently installed version of Mono

Hi,

I hesitated between posting here or the VS for Mac board. But since the issue is specifically related to the UnifiedAPI, I assumed it would be platform specific. Sorry if I'm wrong.

I have mono 4.8.1.0 installed and I made sure to delete all other versions of mono from /Library/Frameworks/Mono.framework/Versions (in case this would be the issue).

If I build my UnifiedAPI branch with this code inside:

[DllImport("__Internal", EntryPoint="mono_get_runtime_build_info")]
public extern static string GetMonoVersion();
...
Console.WriteLine("Mono version: {0}", GetMonoVersion());

I get the following console output:

Mono version: 5.2.0 (tarball)

If I build my ClassicAPI branch with the same code, I get the following console output:

Mono version: 4.8.1 (mono-4.8.0-branch/22a39d7)

Mono version 4.8.1.0 is definitely what is expected since this is what I have installed. Anyone can explain to me what's up with this?

This is quite important for me since I build against mono 4.8.1.0 to solve this issue: https://bugzilla.xamarin.com/show_bug.cgi?id=60128

Any help would be appreciated.