2019-08-07 17:57:03,627 [INFO] {5197} koji.build.buildroot:505 Running mock as kojibuilder
INFO: mock.py version 1.4.14 starting (python version = 3.7.3)...
Start: init plugins
INFO: selinux enabled
Finish: init plugins
Start: run
Start: clean chroot
Finish: clean chroot
Start: chroot init
INFO: calling preinit hooks
INFO: enabled HW Info plugin
Mock Version: 1.4.14
INFO: Mock Version: 1.4.14
Start: dnf install
Finish: dnf install
Finish: chroot init
INFO: Installed packages:
Finish: run
2019-08-07 18:31:55,635 [INFO] {6126} koji.build.buildroot:505 Running mock as kojibuilder
INFO: mock.py version 1.4.14 starting (python version = 3.7.3)...
Start: init plugins
INFO: selinux enabled
Finish: init plugins
Start: run
INFO: Start(/tmp/koji/tasks/362/230362/local/work/tasks/9854/229854/libyang-0.16.105-2.fc31.src.rpm)  Config(f31-build-73183-30897)
Start: chroot init
INFO: calling preinit hooks
INFO: enabled HW Info plugin
Mock Version: 1.4.14
INFO: Mock Version: 1.4.14
Finish: chroot init
Start: build phase for libyang-0.16.105-2.fc31.src.rpm
Start: build setup for libyang-0.16.105-2.fc31.src.rpm
ERROR: Exception(/tmp/koji/tasks/362/230362/local/work/tasks/9854/229854/libyang-0.16.105-2.fc31.src.rpm) Config(f31-build-73183-30897) 2 minutes 50 seconds
INFO: Results and/or logs in: /var/lib/mock/f31-build-73183-30897/result
ERROR: Command failed: 
 # /usr/bin/dnf builddep --installroot /var/lib/mock/f31-build-73183-30897/root/ --setopt=install_weak_deps=0 /var/lib/mock/f31-build-73183-30897/root//builddir/build/SRPMS/libyang-0.16.105-2.fc31.src.rpm --setopt=tsflags=nocontexts
Last metadata expiration check: 0:00:15 ago on Wed 07 Aug 2019 06:00:58 PM EDT.
No matching package to install: 'valgrind'
Not all dependencies satisfied
Error: Some packages could not be found.