Found this by accident while implementing the nrf-802154-sys bindings to the 802.15.4 NRF radio driver here.
Unlike the nrf-mpls-sys and the nrf-sdc-sys bindings, these ones need to be compiled from C source code as the driver is open source.

The compilation failed, because I was defining -DNRF5340_XXAA -DNRF_NETWORK, while for that chip, it seems to be required to be -DNRF5340_XXAA_NETWORK (i.e. a single define arg).

By the way, for the dual-core chips, we sometimes define the core to be the application one, and sometimes the network one. Why so?