It appears the nightly qa skeleton build is not building hello-mod. This is a core feature of the kernel tooling and needs to be regularly built to ensure users can reliably build out of tree modules using the linux-yocto recipes as the PREFERRED_PROVIDER_virtual/kernel.
Committed: http://git.yoctoproject.org/cgit/cgit.cgi/yocto-autobuilder/commit/?id=b861ab6f3ede6dd8f927f5f42b3df73b3edfbf84
In production. Marking resolved.
Verified with fido:8b3d3e7c957ad06c390886487f69aeb8e145da6a https://autobuilder.yoctoproject.org/main/builders/nightly-qa-skeleton/builds/241/steps/BuildImages/logs/stdio/text