I have Mysensors running with nrf24 , I wanted to upgrade Armbian to the latest Stretch. I configured DT overlays by adding
overlays=w1-gpio uart1 i2c0 spi-spidev
to /boot/armbianEnv.txt. I had spidev working, but not the mysgw. It doidn't give me errors, but i was stuck at !TSM:INIT:TSP FAIL.
Maybe the problem is that there is no gpio-sunxi in Stretch... I have no idea.
By the way, i noticed that the new version of Mysensors calls nrf24 transport differently, it is now called --my-transport=rf24.
Please update the guide for Armbian Stretch.