Created attachment 767377 [details]
y2logs

Installation with the live media and snapshots enabled fails:
https://openqa.opensuse.org/tests/657353#step/await_install/21

This is because snapper is not installed in the installation system, so the
snapper installation-helper is missing.
So YaST needs to add a hard dependency there.

The bigger issue is that YaST didn't care that the binary is not present though
(found in y2log-3):

[libstorage] ActiongraphImpl.cc:584 Commit Action "Mounting /dev/vda2 at /"
[sid:59, first]
[libstorage] SystemCmd.cc:67 constructor
SystemCmd("/usr/lib/snapper/installation-helper --step '1' --device '/dev/vda2'
--description 'first root filesystem'")
[libstorage] SystemCmd.cc:186 SystemCmd
Executing:"/usr/lib/snapper/installation-helper --step '1' --device '/dev/vda2'
--description 'first root filesystem'"
[libstorage] SystemCmd.cc:187 timestamp [295.985073], 2018-04-17 02:15:45 GMT,
2018-04-16 22:15:45 EDT
[libstorage] SystemCmd.cc:660 Adding Line 1 "/bin/sh:
/usr/lib/snapper/installation-helper: No such file or directory"
[libstorage] SystemCmd.cc:626 pid:4219 added lines:1 stderr:true
[libstorage] SystemCmd.cc:492 THROW:     Command not found:
"/usr/lib/snapper/installation-helper --step '1' --device '/dev/vda2'
--description 'first root filesystem'"
[libstorage] SystemCmd.cc:416 stopwatch 0.010977s for
"/usr/lib/snapper/installation-helper --step '1' --device '/dev/vda2'
--description 'first root filesystem'"
[libstorage] SystemCmd.cc:436 system() Returns:127
[libstorage] SystemCmd.cc:678 stderr:/bin/sh:
/usr/lib/snapper/installation-helper: No such file or directory
[libstorage] SystemCmd.cc:67 constructor SystemCmd("/sbin/udevadm settle
--timeout=20")

As can be seen, YaST notices the error but ignores it. Similar output for step
2.