INFO: mock.py version 1.4.16 starting (python version = 3.7.4)... Start: init plugins INFO: selinux disabled Finish: init plugins Start: run INFO: Start(/var/tmp/tnef/tnef-1.4.10-5.fc30.art.src.rpm) Config(fedora-15-i386) Start: clean chroot Finish: clean chroot Start: chroot init INFO: calling preinit hooks INFO: enabled root cache INFO: enabled yum cache Start: cleaning yum metadata Finish: cleaning yum metadata INFO: enabled HW Info plugin Mock Version: 1.4.16 INFO: Mock Version: 1.4.16 Start: yum install ERROR: Exception(/var/tmp/tnef/tnef-1.4.10-5.fc30.art.src.rpm) Config(fedora-15-i386) 0 minutes 1 seconds INFO: Results and/or logs in: /var/lib/mock/fedora-15-i386/result ERROR: Command failed: # /usr/bin/yum-deprecated --installroot /var/lib/mock/fedora-15-i386/root/ groupinstall buildsys-build Yum command has been deprecated, use dnf instead. See 'man dnf' and 'man yum2dnf' for more information. There is no installed groups file. Maybe run: yum groups mark convert (see man yum) http://build/atomicorp/atomic-testing/fedora/15/i386/repodata/repomd.xml: [Errno 14] HTTP Error 404 - Not Found Trying other mirror. One of the configured repositories failed (atomic), and yum doesn't have enough cached data to continue. At this point the only safe thing yum can do is fail. There are a few ways to work "fix" this: 1. Contact the upstream for the repository and get them to fix the problem. 2. Reconfigure the baseurl/etc. for the repository, to point to a working upstream. This is most often useful if you are using a newer distribution release than is supported by the repository (and the packages for the previous distribution release still work). 3. Disable the repository, so yum won't use it by default. Yum will then just ignore the repository until you permanently enable it again or use --enablerepo for temporary usage: yum-config-manager --disable atomic-testing 4. Configure the failing repository to be skipped, if it is unavailable. Note that yum will try to contact the repo. when it runs most commands, so will have to try and fail each time (and thus. yum will be be much slower). If it is a very temporary problem though, this is often a nice compromise: yum-config-manager --save --setopt=atomic-testing.skip_if_unavailable=true failure: repodata/repomd.xml from atomic-testing: [Errno 256] No more mirrors to try. http://build/atomicorp/atomic-testing/fedora/15/i386/repodata/repomd.xml: [Errno 14] HTTP Error 404 - Not Found