[PyQt] qmake error when building PyQt4 with Qt5

[T.N.T.]

Hello

I tried to build PyQt 4.10.1 with Qt 5.0.2 and Python 3.3 by passing the 
--qmake parameter as I understood the answer from Phil Thompson to 
another question yesterday:

$ python3 configure-ng.py --confirm-license -q 
/usr/local/Qt-5.0.2/bin/qmake
Querying qmake about your Qt installation...
Determining the details of your Qt installation...
This is the GPL version of PyQt 4.10.1 (licensed under the GNU General 
Public
License) for Python 3.3.0 on linux.
Found the license file pyqt-gpl.sip.
Checking to see if the QtGui module should be built...
Checking to see if the QtHelp module should be built...
Error: /usr/local/Qt-5.0.2/bin/qmake failed to create a makefile from
cfgtest_QtHelp.pro.

Am I missing something?

Regards, T.