gettext-runtime-mini from home:MaxxedSUSE:Compiler-Tools-leap 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/home:MaxxedSUSE:Compiler-Tools-leap/15.6/home:MaxxedSUSE:Compiler-Tools-leap.repo zypper refresh zypper install gettext-runtime-mini