[PyQt] Install error

[Vincent Vande Vyvre]

Hi,

I'm installing PyQt-4.9.5 on Debian 6.0 (Squeeze) and I've this error in
make

----------------------------------------------------------------------
make[1]: entrant dans le répertoire
« /home/vincent/Téléchargements/PyQt-x11-gpl-4.9.5/QtHelp »
...
g++ -shared -Wl,-O1 -Wl,-rpath,/usr/lib -Wl,--version-script=QtHelp.exp
-o QtHelp.so sipQtHelpcmodule.o sipQtHelpQList0100QHelpSearchQuery.o
sipQtHelpQMap0100QString0100QUrl.o sipQtHelpQList0100QStringList.o
sipQtHelpQHelpSearchResultWidget.o sipQtHelpQHelpSearchQueryWidget.o
sipQtHelpQHelpSearchEngine.o sipQtHelpQHelpSearchQuery.o
sipQtHelpQHelpIndexWidget.o sipQtHelpQHelpIndexModel.o
sipQtHelpQHelpEngine.o sipQtHelpQHelpEngineCore.o
sipQtHelpQHelpContentWidget.o sipQtHelpQHelpContentModel.o
sipQtHelpQHelpContentItem.o -L/usr/lib -L/usr/X11R6/lib -lQtHelp -lQtGui
-lQtCore -lXext -lX11 -lm -lpthread
/usr/bin/ld: cannot find -lXext
collect2: ld returned 1 exit status
make[1]: *** [QtHelp.so] Erreur 1
make[1]: quittant le répertoire
« /home/vincent/Téléchargements/PyQt-x11-gpl-4.9.5/QtHelp »
make: *** [all] Erreur 2
vincent at djoliba:~/Téléchargements/PyQt-x11-gpl-4.9.5$
-----------------------------------------------------------------------

Python 2.7.3
libqt4-core 4.6.3
libqt4-gui 4.6.3
libqt4-help 4.6.3
sip-4.14.1

I can't find any information about this lXext.

Thanks for all advices

Vince