Can not locate config makefile for product

[unger]

Hello
I'm using halium 7.1 to build ubuntu toch.
When executing the command breakfast m31
gives the error: *** Can not locate config makefile for product "lineage_m31". Stop.

But I have a file called lineage_m31 in the /device/samsung/m31/ folder

Why does this error occur?

root@bd5509508ee9:/var/android# breakfast m31
including vendor/cm/vendorsetup.sh
build/core/product_config.mk:249: *** Can not locate config makefile for product "lineage_m31".  Stop.
build/core/product_config.mk:249: *** Can not locate config makefile for product "cm_m31".  Stop.
build/core/product_config.mk:249: *** Can not locate config makefile for product "lineage_m31".  Stop.
Device m31 not found. Attempting to retrieve device repository from LineageOS Github (http://github.com/LineageOS).
Repository for m31 not found in the LineageOS Github repository list. If this is in error, you may need to manually add it to your local_manifests/roomservice.xml.
build/core/product_config.mk:249: *** Can not locate config makefile for product "lineage_m31".  Stop.
build/core/product_config.mk:249: *** Can not locate config makefile for product "lineage_m31".  Stop.

** Don't have a product spec for: 'lineage_m31'
** Do you have the right repo manifest?

[Fray_Tormenta]

it's by bad repo manifest. See the paths maybe it's wrong formed