encies resolved.
DEBUG util.py:556:  ================================================================================
DEBUG util.py:556:   Package          Arch          Version                       Repository   Size
DEBUG util.py:556:  ================================================================================
DEBUG util.py:556:  Installing:
DEBUG util.py:556:   rakudo           riscv64       0.2018.10-2.fc30              build       4.2 M
DEBUG util.py:556:  Installing dependencies:
DEBUG util.py:556:   libtommath       riscv64       1.0.1-4.0.riscv64.fc28        build        86 k
DEBUG util.py:556:   libuv            riscv64       1:1.30.1-1.fc31               build       136 k
DEBUG util.py:556:   moarvm           riscv64       0.2019.03-1.fc31              build       1.2 M
DEBUG util.py:556:   nqp              riscv64       0.0.2019.03-2.fc31            build       650 k
DEBUG util.py:556:  Transaction Summary
DEBUG util.py:556:  ================================================================================
DEBUG util.py:556:  Install  5 Packages
DEBUG util.py:556:  Total download size: 6.3 M
DEBUG util.py:556:  Installed size: 36 M
DEBUG util.py:556:  Downloading Packages:
DEBUG util.py:556:  --------------------------------------------------------------------------------
DEBUG util.py:556:  Total                                           1.0 MB/s | 6.3 MB     00:06     
DEBUG util.py:556:  Running transaction check
DEBUG util.py:556:  Transaction check succeeded.
DEBUG util.py:556:  Running transaction test
DEBUG util.py:556:  Transaction test succeeded.
DEBUG util.py:556:  Running transaction
DEBUG util.py:556:  Installed:
DEBUG util.py:556:    rakudo-0.2018.10-2.fc30.riscv64   libtommath-1.0.1-4.0.riscv64.fc28.riscv64  
DEBUG util.py:556:    libuv-1:1.30.1-1.fc31.riscv64     moarvm-0.2019.03-1.fc31.riscv64            
DEBUG util.py:556:    nqp-0.0.2019.03-2.fc31.riscv64   
DEBUG util.py:556:  Complete!
DEBUG util.py:698:  Child return code was: 0
DEBUG util.py:717:  child environment: None
DEBUG util.py:389:  Unsharing. Flags: 134217728
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-65051-29617/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-65051-29617/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-65051-29617/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-65051-29617/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-65051-29617/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