Can not locate config makefile for product

[aadi‏]

I extracted the device tree from stock boot.img and made vendor tree but when i run lunch and select the device this error comes.

Which would you like? [aosp_arm-eng] 25

build/core/product_config.mk:227: *** Can not locate config makefile for product "htc_m8et".  Stop.

adityas-Mac-Pro:android aditya$