There are some OS/Arch combos on that wiki page that are not supported by the buildfarm currently. (ex: Jessie/armhf, Xenial/arm64)
Should there be some kind of notice on the SBC page if this is the case?
If you try to follow the deb install instructions on the wrong arch, the error messages are pretty bad, and hard to debug. (just says ‘Unable to locate package’ on Xenial/arm64)