c31.riscv64 is already installed.
DEBUG util.py:556:  Package glibc-common-2.30-1.fc31.riscv64 is already installed.
DEBUG util.py:556:  Package make-1:4.2.1-14.fc31.riscv64 is already installed.
DEBUG util.py:554:  BUILDSTDERR: Error: 
DEBUG util.py:554:  BUILDSTDERR:  Problem 1: package perl-libwww-perl-6.39-3.fc31.noarch requires perl(Net::HTTP) >= 6.18, but none of the providers can be installed
DEBUG util.py:554:  BUILDSTDERR:   - package perl-XML-SAX-1.02-2.fc31.noarch requires perl(LWP::UserAgent), but none of the providers can be installed
DEBUG util.py:554:  BUILDSTDERR:   - package perl-Net-HTTP-6.19-3.fc31.noarch requires perl(IO::Uncompress::Gunzip), but none of the providers can be installed
DEBUG util.py:554:  BUILDSTDERR:   - conflicting requests
DEBUG util.py:554:  BUILDSTDERR:   - nothing provides perl(Compress::Raw::Bzip2) >= 2.087 needed by perl-IO-Compress-2.087-1.fc31.noarch
DEBUG util.py:554:  BUILDSTDERR:   - nothing provides perl(Compress::Raw::Zlib) >= 2.087 needed by perl-IO-Compress-2.087-1.fc31.noarch
DEBUG util.py:554:  BUILDSTDERR:  Problem 2: package perl-Alien-Build-1.78-2.fc31.noarch requires perl(Archive::Tar), but none of the providers can be installed
DEBUG util.py:554:  BUILDSTDERR:   - package perl-Alien-Libxml2-0.09-3.fc31.riscv64 requires perl(Alien::Base) >= 0.73, but none of the providers can be installed
DEBUG util.py:554:  BUILDSTDERR:   - package perl-Archive-Tar-2.32-440.fc31.noarch requires perl(IO::Compress::Bzip2) >= 2.015, but none of the providers can be installed
DEBUG util.py:554:  BUILDSTDERR:   - package perl-Archive-Tar-2.32-440.fc31.noarch requires perl(IO::Uncompress::Bunzip2) >= 2.015, but none of the providers can be installed
DEBUG util.py:554:  BUILDSTDERR:   - conflicting requests
DEBUG util.py:554:  BUILDSTDERR:   - nothing provides perl(Compress::Raw::Bzip2) >= 2.087 needed by perl-IO-Compress-2.087-1.fc31.noarch
DEBUG util.py:554:  BUILDSTDERR:   - nothing provides perl(Compress::Raw::Zlib) >= 2.087 needed by perl-IO-Compress-2.087-1.fc31.noarch
DEBUG util.py:698:  Child return code was: 1
DEBUG util.py:292:  kill orphans
DEBUG util.py:717:  child environment: None
DEBUG util.py:643:  Executing command: ['/bin/umount', '-n', '/var/lib/mock/f31-build-89119-32037/root/proc/filesystems'] with env {'TERM': 'vt100', 'SHELL': '/bin/sh', 'HOME': '/builddir', 'HOSTNAME': 'mock', 'PATH': '/usr/bin:/bin:/usr/sbin:/sbin', 'LANG': 'en_US.UTF-8'} and shell False
DEBUG util.py:698:  Child return code was: 0
DEBUG util.py:717:  child environment: None
DEBUG util.py:643:  Executing command: ['/bin/umount', '-n', '-l', '/var/lib/mock/f31-build-89119-32037/root/dev/pts'] with env {'TERM': 'vt100', 'SHELL': '/bin/sh', 'HOME': '/builddir', 'HOSTNAME': 'mock', 'PATH': '/usr/bin:/bin:/usr/sbin:/sbin', 'LANG': 'en_US.UTF-8'} and shell False
DEBUG util.py:698:  Child return code was: 0
DEBUG util.py:717:  child environment: None
DEBUG util.py:643:  Executing command: ['/bin/umount', '-n', '-l', '/var/lib/mock/f31-build-89119-32037/root/dev/shm'] with env {'TERM': 'vt100', 'SHELL': '/bin/sh', 'HOME': '/builddir', 'HOSTNAME': 'mock', 'PATH': '/usr/bin:/bin:/usr/sbin:/sbin', 'LANG': 'en_US.UTF-8'} and shell False
DEBUG util.py:698:  Child return code was: 0
DEBUG util.py:717:  child environment: None
DEBUG util.py:643:  Executing command: ['/bin/umount', '-n', '-l', '/var/lib/mock/f31-build-89119-32037/root/sys'] with env {'TERM': 'vt100', 'SHELL': '/bin/sh', 'HOME': '/builddir', 'HOSTNAME': 'mock', 'PATH': '/usr/bin:/bin:/usr/sbin:/sbin', 'LANG': 'en_US.UTF-8'} and shell False
DEBUG util.py:698:  Child return code was: 0
DEBUG util.py:717:  child environment: None
DEBUG util.py:643:  Executing command: ['/bin/umount', '-n', '-l', '/var/lib/mock/f31-build-89119-32037/root/proc'] with env {'TERM': 'vt100', 'SHELL': '/bin/sh', 'HOME': '/builddir', 'HOSTNAME': 'mock', 'PATH': '/usr/bin:/bin:/usr/sbin:/sbin', 'LANG': 'en_US.UTF-8'} and shell False
DEBUG util.py:698:  Child return code was: 0