wbar version 1.3.3+dfsg2-1 failed to build in oneiric

wbar version 1.3.3+dfsg2-1 failed to build in oneiric
Link to failed build: https://launchpad.net/ubuntu/+archive/test-rebuild-20110816/+build/2714561

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/2714561/+files/buildlog_ubuntu-oneiric-amd64.wbar_1.3.3%2Bdfsg2-1_FAILEDTOBUILD.txt.gz

This log snippet might be of interest, since it triggered the matcher 'Purging chroot-autobuild'.
Excerpt 704 lines into the build log:

SuperBar.cc:(.text._ZN8SuperBar7unfocusEv[SuperBar::unfocus()]+0x75): undefined reference to `imlib_context_set_filter'
SuperBar.cc:(.text._ZN8SuperBar7unfocusEv[SuperBar::unfocus()]+0x7a): undefined reference to `imlib_image_filter'
SuperBar.cc:(.text._ZN8SuperBar7unfocusEv[SuperBar::unfocus()]+0xa1): undefined reference to `imlib_context_set_image'
SuperBar.cc:(.text._ZN8SuperBar7unfocusEv[SuperBar::unfocus()]+0xa6): undefined reference to `imlib_free_image'
SuperIcon.o: In function `SuperIcon::SuperIcon(std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, int, int, int, int)':
SuperIcon.cc:(.text+0x9e): undefined reference to `imlib_context_set_image'
SuperIcon.cc:(.text+0xa3): undefined reference to `imlib_clone_image'
SuperIcon.o: In function `SuperIcon::~SuperIcon()':
SuperIcon.cc:(.text+0x18d): undefined reference to `imlib_context_set_image'
SuperIcon.cc:(.text+0x192): undefined reference to `imlib_free_image'
collect2: ld returned 1 exit status
make[1]: *** [wbar] Error 1
make[1]: Leaving directory `/build/buildd/wbar-1.3.3+dfsg2'
make: *** [build-stamp] Error 2
dpkg-buildpackage: error: debian/rules build gave error exit status 2
******************************************************************************
Build finished at 20110824-0959
FAILED [dpkg-buildpackage died]
Purging chroot-autobuild/build/buildd/wbar-1.3.3+dfsg2