Please provide also more information about how to use the build software.
Tobias Lorenzrepo owner
to what I read regarding the MSB6006 error is that it has something to do with checksums the new compiler generates. Most people reported that cleaning the build directory and recreate everything helps. Can you try to do this?
The build process just uses CMake to generate Makefiles or projects suitable for you environment. So it creates Visual Studio Solutions in your case. And from that point on you should be able to open it in VS and compile it.