sary-ruby version 1.2.0-3 failed to build on i386

sary-ruby version 1.2.0-3 failed to build on i386
Link to failed build: https://launchpad.net/ubuntu/+archive/test-rebuild-20110329/+buildjob/2409838

Direct link to the build log: https://launchpad.net/ubuntu/+archive/test-rebuild-20110329/+buildjob/2409838/+files/buildlog_ubuntu-natty-i386.sary-ruby_1.2.0-3_FAILEDTOBUILD.txt.gz

This log snippet might be of interest, since it triggered the matcher 'Purging chroot-autobuild'.
Excerpt 871 lines into the build log:

make[2]: Entering directory `/build/buildd/sary-ruby-1.2.0'
--- Cleaning
dh_testdir
dh_testroot
rm -f build-stamp configure-stamp
[ ! -f Makefile ] || /usr/bin/make distclean
make[3]: Entering directory `/build/buildd/sary-ruby-1.2.0'
make[3]: *** No rule to make target `distclean'. Stop.
make[3]: Leaving directory `/build/buildd/sary-ruby-1.2.0'
make[2]: *** [clean1] Error 2
make[2]: Leaving directory `/build/buildd/sary-ruby-1.2.0'
make[1]: *** [deb] Error 2
make[1]: Leaving directory `/build/buildd/sary-ruby-1.2.0'
make: *** [build-stamp] Error 2
dpkg-buildpackage: error: debian/rules build gave error exit status 2
******************************************************************************
Build finished at 20110408-1857
FAILED [dpkg-buildpackage died]
Purging chroot-autobuild/build/buildd/sary-ruby-1.2.0