Para openSUSE Tumbleweed corra o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/devel:libraries:libyui/openSUSE_Tumbleweed/devel:libraries:libyui.repo
zypper refresh
zypper install rubygem-libyui-rake
Para openSUSE Factory corra o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/devel:libraries:libyui/openSUSE_Factory/devel:libraries:libyui.repo
zypper refresh
zypper install rubygem-libyui-rake
Para assis repo checker corra o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/devel:libraries:libyui/assis_repo_checker/devel:libraries:libyui.repo
zypper refresh
zypper install rubygem-libyui-rake
Para 15.6 corra o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/devel:libraries:libyui/15.6/devel:libraries:libyui.repo
zypper refresh
zypper install rubygem-libyui-rake