gitit version 0.7.3.6-1ubuntu1 failed to build on i386

gitit version 0.7.3.6-1ubuntu1 failed to build on i386
Link to failed build: https://launchpad.net/ubuntu/+archive/test-rebuild-20110329/+buildjob/2393639

Direct link to the build log: https://launchpad.net/ubuntu/+archive/test-rebuild-20110329/+buildjob/2393639/+files/buildlog_ubuntu-natty-i386.gitit_0.7.3.6-1ubuntu1_FAILEDTOBUILD.txt.gz

This log snippet might be of interest, since it triggered the matcher 'Source-dependencies not satisfied'.
Excerpt 707 lines into the build log:

libghc6-recaptcha-doc: missing
libghc6-safe-doc: missing
libghc6-sha-doc: missing
libghc6-texmath-doc: missing
libghc6-text-doc: missing
libghc6-unix-compat-doc: missing
libghc6-url-doc: missing
libghc6-utf8-string-doc: missing
libghc6-xhtml-doc: missing
libghc6-xml-doc: missing
Checking for source dependency conflicts...
  /usr/bin/sudo /usr/bin/apt-get --purge $CHROOT_OPTIONS -q -y install debhelper haskell-devscripts cdbs ghc6 ghc6-prof libghc6-cautious-file-dev libghc6-cgi-dev libghc6-configfile-dev libghc6-feed-dev libghc6-filestore-dev libghc6-happstack-server-dev libghc6-happstack-util-dev libghc6-highlighting-kate-dev libghc6-hslogger-dev libghc6-hstringtemplate-dev libghc6-http-dev libghc6-mtl-dev libghc6-network-dev libghc6-pandoc-dev libghc6-parsec3-dev libghc6-recaptcha-dev libghc6-safe-dev libghc6-sha-dev libghc6-texmath-dev libghc6-text-dev libghc6-unix-compat-dev libghc6-url-dev libghc6-utf8-string-dev libghc6-xhtml-dev libghc6-xml-dev ghc6-doc libghc6-cautious-file-doc libghc6-cgi-doc libghc6-configfile-doc libghc6-feed-doc libghc6-filestore-doc libghc6-happstack-server-doc libghc6-happstack-util-doc libghc6-highlighting-kate-doc libghc6-hslogger-doc libghc6-hstringtemplate-doc libghc6-http-doc libghc6-mtl-doc libghc6-network-doc libghc6-pandoc-doc libghc6-parsec3-doc libghc6-recaptcha-doc libghc6-safe-doc libghc6-sha-doc libghc6-texmath-doc libghc6-text-doc libghc6-unix-compat-doc libghc6-url-doc libghc6-utf8-string-doc libghc6-xhtml-doc libghc6-xml-doc
Reading package lists...
Building dependency tree...
Reading state information...
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 libghc6-happstack-server-dev : Depends: libghc6-unix-dev-2.4.0.2-68f9d but it is not installable
E: Broken packages
apt-get failed.
Package installation failed
Trying to reinstall removed packages:
Trying to uninstall newly installed packages:
Source-dependencies not satisfied; skipping gitit