Allow to include extra repository in the chroot. e.g. the 'libtins' lib is contained in the network:utilities project: https://software.opensuse.org/download.html?project=network%3Autilities&package=libtins and it must be installed with: zypper addrepo https://download.opensuse.org/repositories/network:utilities/openSUSE_Leap_15.1/network:utilities.repo zypper refresh zypper install libtins
Go to "your project" -> Settings, and set "External Repositories:" field. I suppose you only want to add this to Suse repos, so go to: "your project" -> Settings -> "Edit" button near chroot checkbox, and fill the "Repos: " field. We should rename the fields to have the same label across copr, but that is different issue: https://pagure.io/copr/copr/pull-request/930