BTW: It's better to build a simple GPIO IR receiver (eg using a TSOP34138) which you can then use with the "gpio-ir" overlay.
LibreELEC 9.0 will ship without the lirc_xbox driver (it's already removed from current Milhouse builds).
Kernel is moving away from the old lirc drivers to the newer rc-core drivers (with in-kernel decoding support, you don't need userspace lirc for remotes). The lirc_xbox never made it into the upstream kernel, it was only added to OpenELEC (and kept in LibreELEC), and due to the ongoing changes in the kernel we can no longer support it. OpenELEC already removed it, and now we have to do the same as well.
so long,
Hias