Problems building sharing service

[roelkok]

I'm trying to build SharingService.exe for use in Unity, but I've come across many issues. At this point BuildAll.bat stops at

The input line is too long.
The syntax of the command is incorrect.

I'm using Visual Studio Community 2015 update 3. I've retargeted the solution and updated the 'Microsoft.NetCore.UniversalWindowsPlatform' NuGet package in SessionManagerUniversal.UI. I've installed Java 8. But I don't know what to do with the above error.

[klasaf]

I had a similar problem, and I solved moving the folder closer to C:\