might not be your exact issue, but the paths get pretty long and msbuild has a path length limitation: https://docs.microsoft.com/en-us/windows/win32/fileio/naming-a-file#maximum-path-length-limitation

Hrm, not sure that's it. I have encountered long paths previously, but I've been pretty actively building osquery out of this location for some time now. Will try building somewhere short and see if that helps.