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