gcin version 1.5.8-1 failed to build in oneiric

gcin version 1.5.8-1 failed to build in oneiric
Link to failed build: https://launchpad.net/ubuntu/+archive/test-rebuild-20110816/+build/2693706

Details about the rebuild:
http://people.ubuntuwire.org/~wgrant/rebuild-ftbfs-test/test-rebuild-20110816-oneiric.html

Direct link to the build log: https://launchpad.net/ubuntu/+archive/test-rebuild-20110816/+build/2693706/+files/buildlog_ubuntu-oneiric-amd64.gcin_1.5.8-1_FAILEDTOBUILD.txt.gz

This log snippet might be of interest, since it triggered the matcher 'Purging chroot-autobuild'.
Excerpt 1759 lines into the build log:

install -d /build/buildd/gcin-1.5.8/debian/tmp/usr/share/locale/zh_CN/LC_MESSAGES
install -m 644 en_US/gcin.gmo /build/buildd/gcin-1.5.8/debian/tmp/usr/share/locale/en_US/LC_MESSAGES/gcin.mo
install -m 644 zh_CN/gcin.gmo /build/buildd/gcin-1.5.8/debian/tmp/usr/share/locale/zh_CN/LC_MESSAGES/gcin.mo
make[3]: Leaving directory `/build/buildd/gcin-1.5.8/po'
make[2]: Leaving directory `/build/buildd/gcin-1.5.8'
mkdir -p debian/gcin/usr/lib/gtk-2.0/2.10.0/immodules
mv debian/tmp/usr/lib/gtk-2.0/immodules/* debian/gcin/usr/lib/gtk-2.0/2.10.0/immodules/
mkdir -p debian/gcin/usr/lib/gtk-2.0/2.10.0/immodule-files.d
sed -e s,@GTKVER@,2.10.0, debian/gcin.immodules.in > debian/gcin/usr/lib/gtk-2.0/2.10.0/immodule-files.d/gcin.immodules
make[1]: Leaving directory `/build/buildd/gcin-1.5.8'
   dh_install -a
cp: cannot stat `debian/tmp/qt4-im/im-gcin.so': No such file or directory
dh_install: cp -a debian/tmp/qt4-im/im-gcin.so debian/gcin-qt4-immodule/usr/lib/qt4/plugins/inputmethods/ returned exit code 1
make: *** [binary-arch] Error 2
dpkg-buildpackage: error: /usr/bin/fakeroot debian/rules binary-arch gave error exit status 2
******************************************************************************
Build finished at 20110820-1554
FAILED [dpkg-buildpackage died]
Purging chroot-autobuild/build/buildd/gcin-1.5.8