gatling version 0.12-2build1 failed to build in oneiric

gatling version 0.12-2build1 failed to build in oneiric
Link to failed build: https://launchpad.net/ubuntu/+archive/test-rebuild-20110816/+build/2693614

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/2693614/+files/buildlog_ubuntu-oneiric-amd64.gatling_0.12-2build1_FAILEDTOBUILD.txt.gz

This log snippet might be of interest, since it triggered the matcher 'Purging chroot-autobuild'.
Excerpt 257 lines into the build log:

rm -f havealloca.h
echo "#include <stdlib.h>" > havealloca.h
if gcc -pipe -Wall -O2 -fomit-frame-pointer -DUSE_ZLIB -c tryalloca.c -DA >/dev/null 2>&1; then echo "#include <alloca.h>"; fi >> havealloca.h
if gcc -pipe -Wall -O2 -fomit-frame-pointer -DUSE_ZLIB -c tryalloca.c -DB >/dev/null 2>&1; then echo "#include <malloc.h>"; fi >> havealloca.h
rm -f tryalloca.o
gcc -c gatling.c -o gatling.o -I. -pipe -Wall -O2 -fomit-frame-pointer -DUSE_ZLIB
In file included from gatling.c:2:0:
gatling.h:7:22: fatal error: diet/iob.h: No such file or directory
compilation terminated.
make[2]: *** [gatling.o] Error 1
make[2]: Leaving directory `/build/buildd/gatling-0.12'
make[1]: *** [override_dh_auto_build] Error 2
make[1]: Leaving directory `/build/buildd/gatling-0.12'
make: *** [build] Error 2
dpkg-buildpackage: error: debian/rules build gave error exit status 2
******************************************************************************
Build finished at 20110820-1459
FAILED [dpkg-buildpackage died]
Purging chroot-autobuild/build/buildd/gatling-0.12