2019-09-20 09:37:42,190 [INFO] {4360} 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
2019-09-20 10:06:07,563 [INFO] {4781} 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/9647/299647/local/work/tasks/7115/297115/exo-0.12.8-1.fc31.src.rpm)  Config(f31-build-108164-33725)
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 exo-0.12.8-1.fc31.src.rpm
Start: build setup for exo-0.12.8-1.fc31.src.rpm
ERROR: Exception(/tmp/koji/tasks/9647/299647/local/work/tasks/7115/297115/exo-0.12.8-1.fc31.src.rpm) Config(f31-build-108164-33725) 2 minutes 16 seconds
INFO: Results and/or logs in: /var/lib/mock/f31-build-108164-33725/result
ERROR: Command failed: 
 # /usr/bin/dnf builddep --installroot /var/lib/mock/f31-build-108164-33725/root/ --setopt=install_weak_deps=0 /var/lib/mock/f31-build-108164-33725/root//builddir/build/SRPMS/exo-0.12.8-1.fc31.src.rpm --setopt=tsflags=nocontexts
Last metadata expiration check: 0:00:14 ago on Fri 20 Sep 2019 09:40:04 AM EDT.
No matching package to install: 'pkgconfig(libxfce4ui-1) >= 4.14'
Not all dependencies satisfied
Error: Some packages could not be found.