I\'m trying to install Testacular (using nmp) on a Windows 8 Professional (64 bit) laptop, but it fails when it tries to install socket.io as part of this process. The error
In Visual Studio 2010, the command line tool vcbuild.exe is replaced by msbuild.exe. So, please make sure you have right Visual studio.
I ran into the same issue. I fixed this by adding this to environmental variable PATH: C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\vcpackages so that it can find vc build.