boot.sig is missing in ota package

[Umeaboy]

I tried to flash the otapackage I built of android-9.0.0_r37 and fastboot returns this:

[root@localhost maple]# fastboot-android update aosp_g8142-ota-eng.kristoffer.zip
target reported max download size of 536870912 bytes
archive does not contain 'boot.sig'
archive does not contain 'recovery.img'
archive does not contain 'system.img'

Where is the boot.sig supposed to be located?

Here's the entire content of the maple directory:

android-info.txt cache.img kernel ramdisk.img symbols/
aosp_g8142-ota-eng.kristoffer.zip clean_steps.mk obj/ ramdisk-recovery.img system/
boot.img data/ obj_arm/ recovery/ userdata.img
build_fingerprint.txt dex_bootjars/ odm/ recovery.id
build_thumbprint.txt fake_packages/ previous_build_config.mk recovery.img
cache/ gen/ product_copy_files_ignored.txt root/

[jamuir]

the boot.sig message is not important (some update-zips include them -- others do not).

however, it looks like your zip does not include system.img, so something is wrong with your build.