rubygem-net-imap from openSUSE:infrastructure:redmine:stage project
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Add repository and install manually
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/openSUSE:infrastructure:redmine:stage/15.6/openSUSE:infrastructure:redmine:stage.repo zypper refresh zypper install rubygem-net-imap