brewtarget version 1.2.3-1.1 failed to build in oneiric

brewtarget version 1.2.3-1.1 failed to build in oneiric
Link to failed build: https://launchpad.net/ubuntu/+archive/test-rebuild-20110816/+build/2689570

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/2689570/+files/buildlog_ubuntu-oneiric-amd64.brewtarget_1.2.3-1.1_FAILEDTOBUILD.txt.gz

This log snippet might be of interest, since it triggered the matcher 'Purging chroot-autobuild'.
Excerpt 588 lines into the build log:

-- Looking for Q_WS_MAC - not found.
CMake Error at /usr/share/cmake-2.8/Modules/FindPackageHandleStandardArgs.cmake:91 (MESSAGE):
  Could NOT find Qt4 (missing: QT_PHONON_LIBRARY) (found suitable version
  "4.7.3", required is "4.6.0")
Call Stack (most recent call first):
  /usr/share/cmake-2.8/Modules/FindPackageHandleStandardArgs.cmake:252 (_FPHSA_FAILURE_MESSAGE)
  /usr/share/cmake-2.8/Modules/FindQt4.cmake:1162 (FIND_PACKAGE_HANDLE_STANDARD_ARGS)
  CMakeLists.txt:72 (FIND_PACKAGE)

-- Configuring incomplete, errors occurred!
make[1]: *** [override_dh_auto_configure] Error 1
make[1]: Leaving directory `/build/buildd/brewtarget-1.2.3'
make: *** [binary-arch] Error 2
dpkg-buildpackage: error: /usr/bin/fakeroot debian/rules binary-arch gave error exit status 2
******************************************************************************
Build finished at 20110820-0449
FAILED [dpkg-buildpackage died]
Purging chroot-autobuild/build/buildd/brewtarget-1.2.3