Any ideas on why py-qt3-base can't find libXext ?

# ls -l .buildlink/lib/libXext*
lrwxr-xr-x  1 root  wheel  38 Jul 15 20:12 .buildlink/lib/libXext.a -> /usr/pkg/share/x11-links/lib/libXext.a
lrwxr-xr-x  1 root  wheel  39 Jul 15 20:12 .buildlink/lib/libXext.so -> /usr/pkg/share/x11-links/lib/libXext.so
lrwxr-xr-x  1 root  wheel  41 Jul 15 20:12 .buildlink/lib/libXext.so.6 -> /usr/pkg/share/x11-links/lib/libXext.so.6
lrwxr-xr-x  1 root  wheel  43 Jul 15 20:12 .buildlink/lib/libXext.so.6.4 -> /usr/pkg/share/x11-links/lib/libXext.so.6.4

===> Configuring for py23pth-qt3-base-3.11
(cd /pkg_comp/obj/pkgsrc/x11/py-qt3-base/default/PyQt-x11-gpl-3.11 && /usr/bin/env USETOOLS=no PTHREADBASE=/usr M
OC="/usr/pkg/qt3/bin/moc" QTDIR="/usr/pkg/qt3" MOC="/usr/pkg/qt3/bin/moc" QTDIR="/usr/pkg/qt3" MOC="/usr/pkg/qt3/
bin/moc" QTDIR="/usr/pkg/qt3" UIC="/usr/pkg/qt3/bin/uic" MAKECONF=/dev/null USETOOLS="no" OBJECT_FMT="ELF" LIBTOO
L="libtool " LDFLAGS=" -L/usr/pkg/lib -L/usr/pkg/lib/python2p3/config -Wl,-R/usr/pkg/lib/python2p3/config -L/usr/
pkg/lib/python2p3/site-packages -Wl,-R/usr/pkg/lib/python2p3/site-packages -Wl,-R/usr/pkg/lib -L/usr/pkg/qt3/lib 
-Wl,-R/usr/pkg/qt3/lib -L/usr/lib -Wl,-R/usr/lib -L/usr/X11R6/lib -Wl,-R/usr/X11R6/lib" RPATH_FLAG="-R" WHOLE_ARC
HIVE_FLAG="-Wl,--whole-archive" NO_WHOLE_ARCHIVE_FLAG="-Wl,--no-whole-archive" LINK_ALL_LIBGCC_HACK="" PATH=/pkg_
comp/obj/pkgsrc/x11/py-qt3-base/default/.buildlink/bin:/pkg_comp/obj/pkgsrc/x11/py-qt3-base/default/.tools/bin:/p
kg_comp/obj/pkgsrc/x11/py-qt3-base/default/.gcc/bin:/home/kent/bin:/bin:/sbin:/usr/bin:/usr/sbin:/usr/X11R6/bin:/
usr/pkg/bin:/usr/pkg/sbin:/usr/games:/usr/local/bin:/usr/local/sbin:/usr/pkg/bin:/usr/X11R6/bin PREFIX=/usr/pkg L
OCALBASE=/usr/pkg X11BASE=/usr/X11R6 CFLAGS="-O2  -I/usr/pkg/include -I/usr/pkg/include/python2p3 -I/usr/pkg/qt3/
include -DGLX_GLXEXT_LEGACY -I/usr/include -I/usr/pkg/include/freetype2" CPPFLAGS="   -I/usr/pkg/include -I/usr/p
kg/include/python2p3 -I/usr/pkg/qt3/include -DGLX_GLXEXT_LEGACY -I/usr/include -I/usr/pkg/include/freetype2" FFLA
GS="-O" X11PREFIX=/usr/pkg CC="gcc" CXX="g++" CPP="cpp" PTHREAD_CFLAGS="-pthread" PTHREAD_LDFLAGS=" -lpthread" BS
D_INSTALL_PROGRAM="install -c -s -o root -g wheel -m 555"                BSD_INSTALL_SCRIPT="install -c -o root -
g wheel -m 555"                  BSD_INSTALL_LIB="install -c -o root -g wheel -m 555"                    BSD_INST
ALL_DATA="install -c -o root -g wheel -m 444"                    BSD_INSTALL_MAN="install -c -o root -g wheel -m 
444"                     BSD_INSTALL="install"                           BSD_INSTALL_PROGRAM_DIR="install -d -o r
oot -g wheel -m 755"     BSD_INSTALL_SCRIPT_DIR="install -d -o root -g wheel -m 755"             BSD_INSTALL_LIB_
DIR="install -d -o root -g wheel -m 755"                 BSD_INSTALL_DATA_DIR="install -d -o root -g wheel -m 755
"                BSD_INSTALL_MAN_DIR="install -d -o root -g wheel -m 755"                BSD_INSTALL_GAME="instal
l -c -s -o root -g wheel -m 555" PKG_SYSCONFDIR="/usr/pkg/etc" INSTALL_INFO="/pkg_comp/obj/pkgsrc/x11/py-qt3-base
/default/.tools/bin/install-info" MAKEINFO="/pkg_comp/obj/pkgsrc/x11/py-qt3-base/default/.tools/bin/makeinfo" BUI
LDLINK_CACHE_ALL=yes  VIEWBASE=/usr/pkg  /usr/pkg/bin/python2p3 configure.py -b /usr/pkg/bin -d /usr/pkg/lib/pyth
on2p3/site-packages -v /usr/pkg/share/sip2p3)
This is the GPL version of PyQt 3.11 (licensed under the GNU General Public
License) for Python 2p3.4 on netbsd2.

Type 'L' to view the license.
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SIP 4.0rc3 is being used.
Creating features file...
Shared object "libXext.so.6" not found
Error: There was an error creating the features file.
*** Error code 1

Stop.
make: stopped in /usr/pkgsrc/x11/py-qt3-base
*** Error code 1