git clone git://git.openwrt.org/project/libubox.git
cd libubox
# optional turn lua support off
mkdir build && cd build
cmake ../
make
make install

git clone git://nbd.name/luci2/ubus.git
cd ubus
# optional turn lua support off
mkdir build && cd build
cmake ../
make
make install

systemctl start ubus.service
systemctl status ubus.service

chmod o+r /var/run/ubus.sock
chmod o+w /var/run/ubus.sock

$ ubus listen &
$ ubus send foo '{"a":"b"}'