This is for the s390x image provided by the Fedora project. A yum update failed and researching yum.baseurl.org suggested that xz-libs needed to be installed first. The result of that is also a failure:
-bash-4.0# yum install xz-libs
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package xz-libs.s390x 0:4.999.8-0.10.beta.20090817git.fc12 set to be updated
--> Finished Dependency Resolution
Dependencies Resolved
=========================================================================================================================================
Package Arch Version Repository Size
=========================================================================================================================================
Installing:
xz-libs s390x 4.999.8-0.10.beta.20090817git.fc12 fedora 92 k
Transaction Summary
=========================================================================================================================================
Install 1 Package(s)
Update 0 Package(s)
Remove 0 Package(s)
Total size: 92 k
Is this ok [y/N]: y
Downloading Packages:
Running rpm_check_debug
ERROR with rpm_check_debug vs depsolve:
rpmlib(PayloadIsXz) is needed by xz-libs-4.999.8-0.10.beta.20090817git.fc12.s390x
Complete!
(1, [u'Please report this error in http://yum.baseurl.org/report'])
-bash-4.0#