Nexus

This is most probably a bug on my side. I build with all repos and mirrors disabled (SKIP_ARMBIAN_REPO=yes) so everything is built locally, but clearly I've a bug when you don't have that option. Try with it and let me know... meanwhile I'll try to find and fix the bug.

Hi Nexus. It seems you're trying to build on arm64, but my code is using the u-boot + rkbins from HardKernel, which unfortunately only work on x86 / amd64. 
Also, you're better off building from "armbian/build" branch "armbian-next' instead of my "extensions" branch, which is very (very!) volatile.