wmail version 2.0-3 failed to build in oneiric

wmail version 2.0-3 failed to build in oneiric
Link to failed build: https://launchpad.net/ubuntu/+archive/test-rebuild-20110816/+build/2714753

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/2714753/+files/buildlog_ubuntu-oneiric-amd64.wmail_2.0-3_FAILEDTOBUILD.txt.gz

This log snippet might be of interest, since it triggered the matcher 'Purging chroot-autobuild'.
Excerpt 657 lines into the build log:

/build/buildd/wmail-2.0/src/wmail.c:300: undefined reference to `DASetCallbacks'
/build/buildd/wmail-2.0/src/wmail.c:301: undefined reference to `DASetTimeout'
/build/buildd/wmail-2.0/src/wmail.c:313: undefined reference to `XStringListToTextProperty'
/build/buildd/wmail-2.0/src/wmail.c:314: undefined reference to `DAWindow'
/build/buildd/wmail-2.0/src/wmail.c:314: undefined reference to `DADisplay'
/build/buildd/wmail-2.0/src/wmail.c:314: undefined reference to `XSetWMName'
/build/buildd/wmail-2.0/src/wmail.c:317: undefined reference to `DAShow'
/build/buildd/wmail-2.0/src/wmail.c:320: undefined reference to `DAEventLoop'
collect2: ld returned 1 exit status
make[2]: *** [wmail] Error 1
make[2]: Leaving directory `/build/buildd/wmail-2.0/src'
make[1]: *** [wmail] Error 2
make[1]: Leaving directory `/build/buildd/wmail-2.0'
make: *** [build-stamp] Error 2
dpkg-buildpackage: error: debian/rules build gave error exit status 2
******************************************************************************
Build finished at 20110824-0513
FAILED [dpkg-buildpackage died]
Purging chroot-autobuild/build/buildd/wmail-2.0