libXext X apollon

Olá!

Estou instalando o Apollon, no meu Conectiva 10, só que está aparecendo a seguinte mensagem de erro:

[root@starfleet apollon-1.0.1]# ./configure --x-includes=/usr/X11R6/include --x-libraries=/usr/X11R6/lib/
checking build system type... i686-pc-linux-gnu
checking host system type... i686-pc-linux-gnu
checking target system type... i686-pc-linux-gnu
checking for a BSD-compatible install... /usr/bin/install -c
.
.
.
checking for X... libraries /usr/X11R6/lib/, headers /usr/X11R6/include
checking for IceConnectionNumber in -lICE... no
checking for libXext... no
configure: error: We need a working libXext to proceed. Since configure
can't find it itself, we stop here assuming that make wouldn't find
them either.
[root@starfleet apollon-1.0.1]#

Só que a libXext.so.6 está dentro de /usr/X11R6/lib/

[root@starfleet /]# locate libXext
/usr/lib/mozilla/libXext.so
/usr/X11R6/lib/libXext.so.6
/usr/X11R6/lib/libXext.so.6.4
[root@starfleet /]#

Alguem poderia me ajudar?