2019-08-31 10:46:38,189 [INFO] {3573} koji.build.buildroot:440 Running mock as kojibuilder
INFO: mock.py version 1.4.9 starting (python version = 3.6.4)...
Start: init plugins
INFO: selinux disabled
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: 1.4.9
INFO: Mock Version: 1.4.9
Start: dnf install
Finish: dnf install
Finish: chroot init
INFO: Installed packages:
Finish: run
2019-08-31 10:56:50,344 [INFO] {3961} koji.build.buildroot:440 Running mock as kojibuilder
INFO: mock.py version 1.4.9 starting (python version = 3.6.4)...
Start: init plugins
INFO: selinux disabled
Finish: init plugins
Start: run
INFO: Start(/tmp/koji/tasks/9046/279046/local/work/tasks/8882/278882/R-corpus-0.10.0-6.fc31.src.rpm)  Config(f31-build-97243-32914)
Start: chroot init
INFO: calling preinit hooks
INFO: enabled HW Info plugin
Mock Version: 1.4.9
INFO: Mock Version: 1.4.9
Finish: chroot init
Start: build phase for R-corpus-0.10.0-6.fc31.src.rpm
Start: build setup for R-corpus-0.10.0-6.fc31.src.rpm
ERROR: Exception(/tmp/koji/tasks/9046/279046/local/work/tasks/8882/278882/R-corpus-0.10.0-6.fc31.src.rpm) Config(f31-build-97243-32914) 0 minutes 19 seconds
INFO: Results and/or logs in: /var/lib/mock/f31-build-97243-32914/result
ERROR: Command failed: 
 # /usr/bin/dnf builddep --installroot /var/lib/mock/f31-build-97243-32914/root/ /var/lib/mock/f31-build-97243-32914/root//builddir/build/SRPMS/R-corpus-0.10.0-6.fc31.src.rpm
Last metadata expiration check: 0:00:03 ago on Sat 31 Aug 2019 10:57:03 AM UTC.
Error: 
 Problem: conflicting requests
  - nothing provides R(markdown) needed by R-knitr-1.24-1.fc31.noarch