Not found img_info file! can't rebuild img.

[Marietto2008]

Hello,I have unpacked the files stored inside this boot.img file :

https://github.com/raspiduino/a6lte-kvm/releases/download/0.01/boot.tar

and I've used a tool called "unpackbootimg" that I've got from this link :

https://github.com/osm0sis/mkbootimg

this is how I have extracted the files from the boot.img file :

/mnt/zroot2/zroot2/OS/Android-KVM/Galaxy-A6/osm0sis-mkbootimg# mkdir boot

/mnt/zroot2/zroot2/OS/Android-KVM/Galaxy-A6/osm0sis-mkbootimg# ./unpackbootimg -i /mnt/zroot2/zroot2/OS/Android-KVM/Galaxy-A6/Boot-Files/boot-orig.img -o boot

this is what happened :

ANDROID! magic found at: 0
BOARD_KERNEL_CMDLINE androidboot.selinux=permissive androidboot.selinux=permissive
BOARD_KERNEL_BASE 0x10000000
BOARD_NAME SRPRA31B008KU
BOARD_PAGE_SIZE 2048
BOARD_HASH_TYPE sha1
BOARD_KERNEL_OFFSET 0x00008000
BOARD_RAMDISK_OFFSET 0x01000000
BOARD_SECOND_OFFSET 0x00f00000
BOARD_TAGS_OFFSET 0x00000100
BOARD_OS_VERSION 10.0.0
BOARD_OS_PATCH_LEVEL 2021-03
BOARD_DT_SIZE 509952

then I have removed the old kernel and I have replaced it with a new kernel re-compiled by me,where I have enabled KVM. At this point,I want to repack the files previously extracted and this is how I tried to do that :

/mnt/zroot2/zroot2/OS/Android-KVM/Galaxy-A6/xiaolu-mkbootimg_tools# ./mkboot /mnt/zroot2/zroot2/OS/Android-KVM/Galaxy-A6/Boot-Files/boot boot.img

but it didn't work :

mkbootimg from /mnt/zroot2/zroot2/OS/Android-KVM/Galaxy-A6/Boot-Files/boot/img_info.
not found img_info file! can't rebuild img.