if ! chroot "${MNTPOINT}" dpkg --list grub-pc 2>/dev/null | grep -q '^ii' ; then
echo "Notice: grub-pc package not present yet, installing it therefore."
# shellcheck disable=SC2086
if ! chroot "${MNTPOINT}" dpkg --list grub-pc 2>/dev/null | grep -q '^ii' ; then
echo "Notice: grub-pc package not present yet, installing it therefore."
# shellcheck disable=SC2086