When trying to run msbuild.exe against .sln file it results in error message
"error CS1668: Warning as error: Invalid search path
'C:Program Files\Microsoft SDKs\Windows\v6.0A\common\lib'
specified in 'LIB environment variable'.
If you take a look at this folder, there is actually no "common\lib" sub folder.
Solution: Simply create "common\lib" sub folders and rerun MSbuild. MSbuild doesn't actually need anything from this folder but it's set as input variable anyways during Visual Studio setup.