Comment # 7 on bug 954125 from Dominique Leuenberger

Buhuu...

pk 1.0.10 checks if /system-update points to /var/cache/PackageKit (where it
would expect the rpms to reside); if not, it's meant to not do the update, as
it would indicate 'something else prepared for the update'.

we do not provide the /var/cache/PackageKit directory. as we do not store the
RPMs there.. hence, the /system-update symlink is dangling, resulting in
pk-offline-update claiming the triggers were not set (REBOOT action not being
set)

pk-offline-update later on verifies if the symlink points to
/var/cache/PackageKit (without caring if the target exists) and if it does, it
applies the patches...

The easiest fix for us is to just provide an empty directory
/var/cache/PackageKit I guess.