Doesn't Build

*Please describe the question or issue you're facing with "How to build an Ubuntu Linux kernel - Ubuntu Kernel documentation".*

Hello, I've followed the instructions on this page and ended up with a failed build and no .deb packages. This is on Ubuntu 24.04.3, running kernel 6.8.0-79-generic, trying to build its own kernel from both a stock configuration and the existing running configuration (same result in both cases):

>depmod: WARNING: /home//kernel/linux-6.8.0/debian/linux-modules-6.8.0-999-generic/lib/modules/6.8.0-999-generic/kernel/net/openvswitch/openvswitch.ko needs unknown symbol nsh_push
>depmod: WARNING: /home//kernel/linux-6.8.0/debian/linux-modules-6.8.0-999-generic/lib/modules/6.8.0-999-generic/kernel/net/openvswitch/vport-vxlan.ko needs unknown symbol vxlan_dev_create
>EE: Unresolved module dependencies in base package!
>make: *** [debian/rules.d/2-binary-arch.mk:148: /home//kernel/linux-6.8.0/debian/stamps/stamp-install-generic] Error 1

(there's a lot of those kernel object missing dependencies)

I don't know if it's a problem with the source package retrieved with:

>apt source linux-image-unsigned-$(uname -r)

or with this page's instructions!

Thanks very much!
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*Reported from: https://canonical-kernel-docs.readthedocs-hosted.com/latest/how-to/develop-customise/build-kernel/*