libssh4 from home:marec2000:server:dependencies project
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Add repository and install manually
For openSUSE Leap 15.3 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:marec2000:server:dependencies/openSUSE_Leap_15.3/home:marec2000:server:dependencies.repo zypper refresh zypper install libssh4