qtdesktopcomponents-git build error 2013-04-23

==> Making package: qtdesktopcomponents-git 20130322-1 (Tue Apr 23 18:39:45 CEST 2013)
==> Checking runtime dependencies...
==> Checking buildtime dependencies...
==> Retrieving sources...
==> Extracting sources...
==> Removing existing pkg/ directory...
==> Starting build()...
==> Connecting to GIT server....
==> The local files are updated.
HEAD is now at 5fd9dec... Remove unused files
==> GIT checkout done or server timeout
==> Starting build...
Cloning into '/tmp/packerbuild-1000/qtdesktopcomponents-git/qtdesktopcomponents-git/src/qtdesktopcomponents-build'...
done.
Note: checking out '5fd9dec6595a4c41d789ef4648253525168c04d4'.

You are in 'detached HEAD' state. You can look around, make experimental
changes and commit them, and you can discard any commits you make in this
state without impacting any branches by performing another checkout.

If you want to create a new branch to retain commits you create, you may
do so (now or later) by using -b with the checkout command again. Example:

  git checkout -b new_branch_name

Info: creating cache file /tmp/packerbuild-1000/qtdesktopcomponents-git/qtdesktopcomponents-git/src/qtdesktopcomponents-build/.qmake.cache
cd src/ && ( test -e Makefile || /usr/lib/qt/bin/qmake /tmp/packerbuild-1000/qtdesktopcomponents-git/qtdesktopcomponents-git/src/qtdesktopcomponents-build/src/src.pro -o Makefile ) && make -f Makefile
make[1]: Entering directory `/tmp/packerbuild-1000/qtdesktopcomponents-git/qtdesktopcomponents-git/src/qtdesktopcomponents-build/src'
cd qtdesktop/ && ( test -e Makefile || /usr/lib/qt/bin/qmake /tmp/packerbuild-1000/qtdesktopcomponents-git/qtdesktopcomponents-git/src/qtdesktopcomponents-build/src/qtdesktop/qtdesktop.pro -o Makefile ) && make -f Makefile
Project ERROR: No version for documentation specified.
make[1]: *** [sub-qtdesktop-make_first] Error 3
make[1]: Leaving directory `/tmp/packerbuild-1000/qtdesktopcomponents-git/qtdesktopcomponents-git/src/qtdesktopcomponents-build/src'
make: *** [sub-src-make_first] Error 2
==> ERROR: A failure occurred in build().
    Aborting...
The build failed.