On 03-02-2023 18:11, Julien Lepiller wrote:
> gnu packages minetest) imports (guix build-system
> minetest) but never uses the minetest-build-system. (gnu packages
> abiword) uses (guix build-system gnu) but does not use the
> gnu-build-system.
> 

The build-system minetest-build-system does not exist; it's 
minetest-mod-build-system, which happens to be defined in (guix 
build-system build-system).  As such, (gnu packages minetest) actually 
does use (guix build-system minetest).

The idea was that in the future we might also package 'subgames' and 
texture packages, for which a 'minetest-subgame-build-system' and 
'minetest-texture-pack-build-system' build system could be defined.
It seemed a bit pointless to me to put those not-yet-defined build 
systems in separate modules.

Greetings,
Maxime.