Hi to all maintainers, TL;DR: If you use yum-utils on fedora (For e.g using yum-builddep) you need to switch to dnf-utils. As you may know we had encountered many issues when trying to get CI to work well for FC27 and Fedora RAWHIDE. One of the main reasons for the issues we've seen was that we were using 'yum' instead of 'dnf' to setup Fedora build and test environments. In FC27 and RAWHIDe, some packages simply stopped being compatible with yum. It took us a while to resolve this since we needed to get some patches merged upstream to the tools we use, but since yesterday we switched to using DNF for setting up FC environments. While we were waiting for the tools to get patched, our work-around was to freeze the mirrors our CI system uses so that newer and incompatible packages were invisible in CI. Since we now have a fix in place we started re-syncing our mirrors to get newer packages. A side effect of this, is that dnf-incompatible code in build and test scripts was exposed. One such common case is scripts using 'yum-builddep' with 'yum-utils' installed instead of 'dnf-utils'. In this case yum-incompatible packages will fail to be downloaded. Bottom line - if you use yum-based tools in your build/test scripts, they need to be changed to dnf-based tools when those scripts run in Fedora. Sometime this can be as simple as changing the packages listed in your *.packages files for Fedora. See for example this patch which switches from yum-utils to dnf-utils: https://gerrit.ovirt.org/c/88630/ -- Barak Korren RHV DevOps team , RHCE, RHCi Red Hat EMEA redhat.com | TRIED. TESTED. TRUSTED. | redhat.com/trusted