Qt build include dirs - QtSDK comparison

[QbProg]

Hello,
I'm building a custom Qt version using MSVC 2010, and after a nmake clean I get a tree where both the "include" and "src" dirs are needed. The files in the include dir just point to the ones in the src dir , something like
#include "../../src/Qxxxxx.h"

now, If I take the relative package installed in the Qt SDK I see that there's just a nice clean include dir. Also, there's a big difference in the total file count too.
I would like to get,from the build tree, a nice directory tree like the one installed in the SDK.
I see that make install is not supported in windows, but how do the Qt SDK developers obtain it?

Thank you for any hint,
Qb