libqt5-qtbase from home:Orville:Dependencies project
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Add repository and install manually
For OpenSUSE Leap 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:Orville:Dependencies/OpenSUSE_Leap_15.4/home:Orville:Dependencies.repo zypper refresh zypper install libqt5-qtbase