[ros-users] Problem- build failed in jenkins

I'm having a problem releasing a package that was successful in pre-release.

http://jenkins.willowgarage.com:8080/job/ros-groovy-sr-ronex_binarydeb_precise_i386/1/

The error I'm getting seems to be caused by the release scripts not finding
the module rospkg.distro.

+ rosrun rosdeb single_deb.py groovy sr_ronex precise i386
Traceback (most recent call last):
  File "<
http://jenkins.willowgarage.com:8080/job/ros-groovy-sr-ronex_binarydeb_precise_i386/ws/ros_release/rosdeb/scripts/single_deb.py",>
line 52, in <module>
    from rospkg.distro import distro_uri, load_distro
ImportError: No module named rospkg.distro
Build step 'Execute shell' marked build as failure
Build step 'Groovy Postbuild' marked build as failure

Is there something wrong with the release scripts, or is it something I
haven't done correctly?

Thanks

Toni