Comment # 1 on bug 966145 from Steffen Winterfeldt

The gem is packaged differently on i586, s390x, aarch64 than on x86_64 and
ppc64.

I felt some slight curiosity as to why rubygems might need to resemble a
landfill
for about 11 seconds. But the feeling is gone now.

So the fix will be

https://github.com/openSUSE/installation-images/pull/85