guile-1.8-non-dfsg version 1.8.8+1-1 failed to build in oneiric

guile-1.8-non-dfsg version 1.8.8+1-1 failed to build in oneiric
Link to failed build: https://launchpad.net/ubuntu/+archive/test-rebuild-20110816/+build/2695394

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/2695394/+files/buildlog_ubuntu-oneiric-i386.guile-1.8-non-dfsg_1.8.8%2B1-1_FAILEDTOBUILD.txt.gz

This log snippet might be of interest, since it triggered the matcher 'Purging chroot-autobuild'.
Excerpt 334 lines into the build log:

   debian/rules override_dh_testdir
make[1]: Entering directory `/build/buildd/guile-1.8-non-dfsg-1.8.8+1'
dh_testdir GUILE-VERSION debian/changelog
make[1]: Leaving directory `/build/buildd/guile-1.8-non-dfsg-1.8.8+1'
   debian/rules override_dh_autoreconf
make[1]: Entering directory `/build/buildd/guile-1.8-non-dfsg-1.8.8+1'
cd doc/goops && ln -sf goops.texi goops-1.8.texi
cd doc/ref && ln -sf guile.texi guile-1.8.texi
dh_autoreconf -- autoreconf -i --force --verbose
autoreconf: `configure.ac' or `configure.in' is required
dh_autoreconf: autoreconf -i --force --verbose autoreconf -i --force --verbose returned exit code 1
make[1]: *** [override_dh_autoreconf] Error 2
make[1]: Leaving directory `/build/buildd/guile-1.8-non-dfsg-1.8.8+1'
make: *** [build] Error 2
dpkg-buildpackage: error: debian/rules build gave error exit status 2
******************************************************************************
Build finished at 20110822-0452
FAILED [dpkg-buildpackage died]
Purging chroot-autobuild/build/buildd/guile-1.8-non-dfsg-1.8.8+1