INFO: mock.py version 1.4.3 starting (python version = 3.6.2)...
Start: init plugins
INFO: selinux disabled
Finish: init plugins
Start: run
INFO: Start(/var/tmp/grepcidr/grepcidr-2.0-1.fc26.art.src.rpm)  Config(fedora-10-x86_64)
Start: clean chroot
Finish: clean chroot
Start: chroot init
INFO: calling preinit hooks
INFO: enabled root cache
Start: unpacking root cache
Finish: unpacking root cache
INFO: enabled yum cache
Start: cleaning yum metadata
Finish: cleaning yum metadata
INFO: enabled HW Info plugin
Mock Version: 1.4.3
INFO: Mock Version: 1.4.3
Start: yum update
Finish: yum update
Finish: chroot init
Start: build phase for grepcidr-2.0-1.fc26.art.src.rpm
Start: build setup for grepcidr-2.0-1.fc26.art.src.rpm
ERROR: Exception(/var/tmp/grepcidr/grepcidr-2.0-1.fc26.art.src.rpm) Config(fedora-10-x86_64) 0 minutes 7 seconds
INFO: Results and/or logs in: /var/lib/mock/fedora-10-x86_64/result
ERROR: Command failed: 
 # /usr/bin/systemd-nspawn -q -M 997e2db3e4734d7ab51f1d1d28ada1df -D /var/lib/mock/fedora-10-x86_64/root -a --setenv=TERM=vt100 --setenv=SHELL=/bin/bash --setenv=HOME=/builddir --setenv=HOSTNAME=mock --setenv=PATH=/usr/bin:/bin:/usr/sbin:/sbin --setenv=PROMPT_COMMAND=printf "\033]0;<mock-chroot>\007" --setenv=PS1=<mock-chroot> \s-\v\$  --setenv=LANG=en_US.UTF-8 -u mockbuild /bin/rpm -Uvh --nodeps /builddir/build/originals/grepcidr-2.0-1.fc26.art.src.rpm