* gnu/packages/patches/luanti-paths.patch: New file.
* gnu/packages/luanti.scm (luanti)[source]: Use it.
[#:phases]<check>: Use LUANTI_GAME_PATH.
[native-search-paths]: Rename “MINETEST_GAME_PATH” to “LUANTI_GAME_PATH”.
Rename “MINETEST_MOD_PATH” to “LUANTI_MOD_PATH”.
* gnu/local.mk (dist_patch_DATA): Adjust accordingly.
* guix/build/luanti-build-system.scm (check): Use LUANTI_MOD_PATH.