2019-08-13 23:03:34,978 [INFO] {9216} 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
2019-08-13 23:26:32,976 [INFO] {9542} 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/1537/261537/local/work/tasks/1372/261372/ristretto-0.10.0-2.fc31.src.rpm)  Config(f31-build-88651-31984)
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 ristretto-0.10.0-2.fc31.src.rpm
Start: build setup for ristretto-0.10.0-2.fc31.src.rpm
ERROR: Exception(/tmp/koji/tasks/1537/261537/local/work/tasks/1372/261372/ristretto-0.10.0-2.fc31.src.rpm) Config(f31-build-88651-31984) 2 minutes 24 seconds
INFO: Results and/or logs in: /var/lib/mock/f31-build-88651-31984/result
ERROR: Command failed: 
 # /usr/bin/dnf builddep --installroot /var/lib/mock/f31-build-88651-31984/root/ --setopt=install_weak_deps=0 /var/lib/mock/f31-build-88651-31984/root//builddir/build/SRPMS/ristretto-0.10.0-2.fc31.src.rpm --setopt=tsflags=nocontexts
Last metadata expiration check: 0:00:12 ago on Tue 13 Aug 2019 11:06:03 PM EDT.
No matching package to install: 'libxfce4ui-devel >= 4.14'
No matching package to install: 'xfconf-devel >= 4.14'
Not all dependencies satisfied
Error: Some packages could not be found.