gemanx-gtk2 version 0.1.0.3-1 failed to build on i386

gemanx-gtk2 version 0.1.0.3-1 failed to build on i386
Link to failed build: https://launchpad.net/ubuntu/+archive/test-rebuild-20110329/+buildjob/2393392

Direct link to the build log: https://launchpad.net/ubuntu/+archive/test-rebuild-20110329/+buildjob/2393392/+files/buildlog_ubuntu-natty-i386.gemanx-gtk2_0.1.0.3-1_FAILEDTOBUILD.txt.gz

This log snippet might be of interest, since it triggered the matcher 'Purging chroot-autobuild'.
Excerpt 1620 lines into the build log:

/usr/bin/ld: working_area.o: undefined reference to symbol 'XRootWindowOfScreen'
/usr/bin/ld: note: 'XRootWindowOfScreen' is defined in DSO /usr/lib/libX11.so.6 so try adding it to the linker command line
/usr/lib/libX11.so.6: could not read symbols: Invalid operation
collect2: ld returned 1 exit status
make[4]: *** [gemanx] Error 1
make[4]: Leaving directory `/build/buildd/gemanx-gtk2-0.1.0.3/src'
make[3]: *** [all-recursive] Error 1
make[3]: Leaving directory `/build/buildd/gemanx-gtk2-0.1.0.3/src'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/build/buildd/gemanx-gtk2-0.1.0.3'
make[1]: *** [all] Error 2
make[1]: Leaving directory `/build/buildd/gemanx-gtk2-0.1.0.3'
dh_auto_build: make -j1 returned exit code 2
make: *** [build] Error 2
dpkg-buildpackage: error: debian/rules build gave error exit status 2
******************************************************************************
Build finished at 20110408-1911
FAILED [dpkg-buildpackage died]
Purging chroot-autobuild/build/buildd/gemanx-gtk2-0.1.0.3