desktopcouch version 1.0.7-0ubuntu2 failed to build in oneiric

desktopcouch version 1.0.7-0ubuntu2 failed to build in oneiric
Link to failed build: https://launchpad.net/ubuntu/+archive/test-rebuild-20110816/+build/2691344

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/2691344/+files/buildlog_ubuntu-oneiric-i386.desktopcouch_1.0.7-0ubuntu2_FAILEDTOBUILD.txt.gz

This log snippet might be of interest, since it triggered the matcher 'Purging chroot-autobuild'.
Excerpt 643 lines into the build log:

dpkg-buildpackage: export CFLAGS from dpkg-buildflags (origin: vendor): -g -O2
dpkg-buildpackage: export CPPFLAGS from dpkg-buildflags (origin: vendor):
dpkg-buildpackage: export CXXFLAGS from dpkg-buildflags (origin: vendor): -g -O2
dpkg-buildpackage: export FFLAGS from dpkg-buildflags (origin: vendor): -g -O2
dpkg-buildpackage: export LDFLAGS from dpkg-buildflags (origin: vendor): -Wl,-Bsymbolic-functions
dpkg-buildpackage: source package desktopcouch
dpkg-buildpackage: source version 1.0.7-0ubuntu2
 dpkg-source --before-build desktopcouch-1.0.7
dpkg-buildpackage: host architecture i386
 /usr/bin/fakeroot debian/rules clean
/usr/share/cdbs/1/class/python-vars.mk:115: WARNING: Use of XS-Python-Version and XB-Python-Version fields in debian/control is deprecated with pysupport method; use debian/pyversions if you need to specify specific versions.
debian/rules:8: /usr/share/cdbs/1/rules/langpack.mk: No such file or directory
/usr/share/cdbs/1/rules/simple-patchsys.mk:31: WARNING: simple-patchsys.mk is deprecated - please use source format 3.0 (quilt) instead
make: *** No rule to make target `/usr/share/cdbs/1/rules/langpack.mk'. Stop.
dpkg-buildpackage: error: /usr/bin/fakeroot debian/rules clean gave error exit status 2
******************************************************************************
Build finished at 20110817-0137
FAILED [dpkg-buildpackage died]
Purging chroot-autobuild/build/buildd/desktopcouch-1.0.7