[opensuse] zypper dup -n?

In our environment we install thousands of python, perl and ruby modules/gems packaged by the distro. I'm experimenting with a zypper dup on our systems and I see many of these packages break. Is is possible to extract a list of all packages that require attention without performing the upgrade? If so I can remove them, and then perform a zypper dup. Alternatively I have in our configuration management a list of all the modules/gems and I could remove them all, and then dup, and figure out what we need afterwards. Any other approaches I should consider? Thanks, Michael -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org