Target board is Orange Pi PC+ based on H3 the <ump/ump.h> file is needed which must contains in linux-headers-XXX-sunxi with version match to 20.02.0-rc1 however aptitude search linux-h | grep sunxi outputs linux-headers-current-sunxi 19.11.3 <none> Linux kernel headers for 5.3.9-sunxi on armhf linux-headers-legacy-sunxi 19.11.3 <none> Linux kernel headers for 4.19.84-sunxi on armhf linux-headers-nex