lk1st cannot boot kernel

[wctrl]

fastboot boot or fastboot flash boot ... && fastboot reboot with lk1st always cause DTB offset is incorrect, kernel image does not have appended DTB, even with lk2nd image.
lk1st was installed using: fastboot flash aboot build-lk1st-msm8960/emmc_appsboot.mbn

UART log:

[868100] fastboot: download:00037810
[868110] fastboot: boot
[868110] DTB offset is incorrect, kernel image does not have appended DTB
[868120] Device info 0x00000079/00010002/0x00000f15/0, pmic 0x0/0x0/0x0/0x0

fastboot log:

$ fastboot boot build-lk2nd-msm8960/lk2nd.img
Sending 'boot.img' (222 KB)                        OKAY [  0.010s]
Booting                                            FAILED (remote: 'dtb not found')
fastboot: error: Command failed

Any advice?