$ sudo grub-mkconfig |& tail
set menu_color_highlight=black/light-gray
### END /etc/grub.d/05_debian_theme ###
### BEGIN /etc/grub.d/10_linux ###
### END /etc/grub.d/10_linux ###
### BEGIN /etc/grub.d/10_linux_zfs ###
/etc/grub.d/10_linux_zfs: 425: version_find_latest: not found
umount: /tmp/zfsmnt.XMN7oz: target is busy.
rmdir: failed to remove '/tmp/zfsmnt.XMN7oz': Device or resource busy
Oops, forgot to merge stdout and stderr with |&
$ sudo grub-mkconfig |& tail highlight= black/light- gray d/05_debian_ theme ###
set menu_color_
### END /etc/grub.
### BEGIN /etc/grub. d/10_linux ### d/10_linux ###
### END /etc/grub.
### BEGIN /etc/grub. d/10_linux_ zfs ### d/10_linux_ zfs: 425: version_ find_latest: not found XMN7oz' : Device or resource busy
/etc/grub.
umount: /tmp/zfsmnt.XMN7oz: target is busy.
rmdir: failed to remove '/tmp/zfsmnt.