In the YaST change only very minor and unrelated changes has been introduced. To be precise: yast2 changed from 3.1.205 to 3.1.206 yast2-installation changed from 3.1.215 to 3.1.216 yast2-ruby-bindings changed to 3.1.50 to 3.1.51 yast2-branding-openSUSE changed from 3.1.40 to 3.1.41 I tried reverting the changes introduced in yast2, yast2-installation and yast2-ruby-bindings and it still fails. So the culprit is not any change in YaST. rubygem-fast_gettext is also unchanged, so it shouldn't be the culprit either.