Hello!
I follow instruction
"Add names of overlays you want to activate to overlays= line in /boot/armbianEnv.txt"
I try to find /boot/armbianEnv.txt but nothing.
I see Build tools overview from https://github.com/armbian/build/blob/fcb8b6f195bbb76c83c612c425fdf08cfd48c68b/README.md
And nothing about /boot/armbianEnv.txt
May be documentation talking about build/config/bootenvrockchip.txt and build/config/zynq.txt and others txt files in build/config/
Negative. Users don't need and should not change build script internals. When you do, also your script will not update anymore.
Try to find reasoning for current situation, not adjusting documentation to the use case that will not be supported. At least not this way.
u-boot sources perhaps?