I can\'t find any information on how to install Qt built on Windows.
In wiki article How to set up shadow builds on Mac and Linux there\'s description of -prefix>
Qt on Windows is not installable with make install, you will notice that Qt installer for Windows just patches dlls & pdbs for the new install location.
What I would suggest is to do a shadow build in the place you would like to install it. You can manually remove *.obj files to save up space.