python-ldap-doc version 2.3-2.1 failed to build in oneiric

python-ldap-doc version 2.3-2.1 failed to build in oneiric
Link to failed build: https://launchpad.net/ubuntu/+archive/test-rebuild-20110816/+build/2709432

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/2709432/+files/buildlog_ubuntu-oneiric-i386.python-ldap-doc_2.3-2.1_FAILEDTOBUILD.txt.gz

This log snippet might be of interest, since it triggered the matcher 'Purging chroot-autobuild'.
Excerpt 913 lines into the build log:

make[1]: Leaving directory `/build/buildd/python-ldap-doc-2.3'
set -e; \
 v=`dpkg-parsechangelog | sed -n 's/^Version: //p'`; \
 v=${v%-*}; \
 d=`dpkg-parsechangelog | sed -n 's/^Date: //p'`; \
 d=`LC_TIME=C date +"%B %e, %Y" -d "$d"`; \
 printf "\\\\release{$v}\\\\setshortversion{$v}\\\\date{$d}" > Doc/version.tex
cd Doc && /usr/bin/make python-ldap/index.html && rm -f python-ldap/*.idx
make[1]: Entering directory `/build/buildd/python-ldap-doc-2.3/Doc'
/usr/bin/env TEXINPUTS=/usr/lib/python2.5/doc/texinputs:: /usr/lib/python2.5/doc/tools/mkhowto --html python-ldap.tex
/usr/bin/env: /usr/lib/python2.5/doc/tools/mkhowto: No such file or directory
make[1]: *** [python-ldap/index.html] Error 127
make[1]: Leaving directory `/build/buildd/python-ldap-doc-2.3/Doc'
make: *** [build/python-ldap-doc] Error 2
dpkg-buildpackage: error: debian/rules build gave error exit status 2
******************************************************************************
Build finished at 20110826-1913
FAILED [dpkg-buildpackage died]
Purging chroot-autobuild/build/buildd/python-ldap-doc-2.3