minetest.register_alias("stairs:stair_black", "bakedclay:stair_baked_clay_black")
minetest.log("action", "[minetest_mm] Alias stairs:stair_black -> bakedclay:stair_baked_clay_black registered.")

minetest.register_alias("stairs:slab_apple_tree_planks", "moretrees:slab_apple_tree_planks")
minetest.log("action", "[minetest_mm] Alias stairs:slab_apple_tree_planks -> moretrees:slab_apple_tree_planks registered.")