wmpuzzle version 0.5.0-4 failed to build in oneiric

wmpuzzle version 0.5.0-4 failed to build in oneiric
Link to failed build: https://launchpad.net/ubuntu/+archive/test-rebuild-20110816/+build/2714846

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/2714846/+files/buildlog_ubuntu-oneiric-amd64.wmpuzzle_0.5.0-4_FAILEDTOBUILD.txt.gz

This log snippet might be of interest, since it triggered the matcher 'Purging chroot-autobuild'.
Excerpt 456 lines into the build log:

/build/buildd/wmpuzzle-0.5.0/src/wmgeneral.c:448: undefined reference to `XSelectInput'
/build/buildd/wmpuzzle-0.5.0/src/wmgeneral.c:450: undefined reference to `XStringListToTextProperty'
/build/buildd/wmpuzzle-0.5.0/src/wmgeneral.c:455: undefined reference to `XSetWMName'
/build/buildd/wmpuzzle-0.5.0/src/wmgeneral.c:463: undefined reference to `XCreateGC'
/build/buildd/wmpuzzle-0.5.0/src/wmgeneral.c:467: undefined reference to `XCreateBitmapFromData'
/build/buildd/wmpuzzle-0.5.0/src/wmgeneral.c:469: undefined reference to `XShapeCombineMask'
/build/buildd/wmpuzzle-0.5.0/src/wmgeneral.c:470: undefined reference to `XShapeCombineMask'
/build/buildd/wmpuzzle-0.5.0/src/wmgeneral.c:481: undefined reference to `XSetWMHints'
/build/buildd/wmpuzzle-0.5.0/src/wmgeneral.c:483: undefined reference to `XSetCommand'
/build/buildd/wmpuzzle-0.5.0/src/wmgeneral.c:484: undefined reference to `XMapWindow'
collect2: ld returned 1 exit status
make[1]: *** [wmpuzzle] Error 1
make[1]: Leaving directory `/build/buildd/wmpuzzle-0.5.0/src'
make: *** [build] Error 2
dpkg-buildpackage: error: debian/rules build gave error exit status 2
******************************************************************************
Build finished at 20110824-1034
FAILED [dpkg-buildpackage died]
Purging chroot-autobuild/build/buildd/wmpuzzle-0.5.0