The --spec option doesn't work with -rw------- files

[praiskup]

INFO: EXCEPTION: [Error('Command failed: \n # /usr/bin/systemd-nspawn -q -M dcb76b3793154753873b620c85c143c0 -D /var/lib/mock/fedora-38-x86_64-5874-23614/root -a -u mockbuild --capability=cap_ipc_lock --bind=/tmp/mock-resolv.hlsh9u8n:/etc/resolv.conf --bind=/dev/btrfs-control --bind=/dev/mapper/control --bind=/dev/fuse --bind=/dev/loop-control --bind=/dev/loop0 --bind=/dev/loop1 --bind=/dev/loop2 --bind=/dev/loop3 --bind=/dev/loop4 --bind=/dev/loop5 --bind=/dev/loop6 --bind=/dev/loop7 --bind=/dev/loop8 --bind=/dev/loop9 --bind=/dev/loop10 --bind=/dev/loop11 --console=pipe --setenv=TERM=vt100 --setenv=SHELL=/bin/bash --setenv=HOME=/builddir --setenv=HOSTNAME=mock --setenv=PATH=/usr/bin:/bin:/usr/sbin:/sbin \'--setenv=PROMPT_COMMAND=printf "\\033]0;<mock-chroot>\\007"\' \'--setenv=PS1=<mock-chroot> \\s-\\v\\$ \' --setenv=LANG=C.UTF-8 --resolv-conf=off bash --login -c \'/usr/bin/rpmbuild -bs  --target x86_64 --nodeps /builddir/build/originals/test-C.spec\'\n', 1)]
Traceback (most recent call last):
  File "/usr/lib/python3.12/site-packages/mockbuild/trace_decorator.py", line 93, in trace
    result = func(*args, **kw)
             ^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/site-packages/mockbuild/util.py", line 612, in do_with_status
    raise exception.Error("Command failed: \n # %s\n%s" % (cmd_pretty(command, env), output), child.returncode)
mockbuild.exception.Error: Command failed:
 # /usr/bin/systemd-nspawn -q -M dcb76b3793154753873b620c85c143c0 -D /var/lib/mock/fedora-38-x86_64-5874-23614/root -a -u mockbuild --capability=cap_ipc_lock --bind=/tmp/mock-resolv.hlsh9u8n:/etc/resolv.conf --bind=/dev/btrfs-control --bind=/dev/mapper/control --bind=/dev/fuse --bind=/dev/loop-control --bind=/dev/loop0 --bind=/dev/loop1 --bind=/dev/loop2 --bind=/dev/loop3 --bind=/dev/loop4 --bind=/dev/loop5 --bind=/dev/loop6 --bind=/dev/loop7 --bind=/dev/loop8 --bind=/dev/loop9 --bind=/dev/loop10 --bind=/dev/loop11 --console=pipe --setenv=TERM=vt100 --setenv=SHELL=/bin/bash --setenv=HOME=/builddir --setenv=HOSTNAME=mock --setenv=PATH=/usr/bin:/bin:/usr/sbin:/sbin '--setenv=PROMPT_COMMAND=printf "\033]0;<mock-chroot>\007"' '--setenv=PS1=<mock-chroot> \s-\v\$ ' --setenv=LANG=C.UTF-8 --resolv-conf=off bash --login -c '/usr/bin/rpmbuild -bs  --target x86_64 --nodeps /builddir/build/originals/test-C.spec'

[buckaroogeek]

I encountered this same error when doing a mockbuild of a package (cri-o). Is there a possible work around?