то можно получить
mkisofs -o cls-22.0.1-efi.iso -R -J -v -d -N -x cls-22.0.1-efi.iso \
-hide-rr-moved -no-emul-boot -eltorito-platform efi -f -posix-L \
-eltorito-boot boot/grub/efi.img -V "CLS-20221020" \
-iso-level 3 -allow-leading-dots \
-publisher "Horns and Foots" -preparer "Mister X" \
-A "Calculate Linux Scratch 22.0.1 EFI boot ISO" .
mkisofs -o cls-22.0.1-mbr.iso -R -J -v -d -N -x cls-22.0.1-mbr.iso \
-hide-rr-moved -no-emul-boot -eltorito-platform x86 -f -posix-L \
-eltorito-boot isolinux/isolinux.bin -eltorito-catalog isolinux/boot.cat \
-boot-load-size 4 -boot-info-table \
-V "CLS-20221020" -iso-level 3 -allow-leading-dots \
-publisher "Horns and Foots" -preparer "Mister X" \
-A "Calculate Linux Scratch 22.0.1 MBR boot ISO" .
boot
deploy
EFI
id19908.uefi
isolinux
livecd
livecd.squashfs
makefiboot.sh
makmbrboot.sh
syslinux