diff --git a/worldedit_commands/init.lua b/worldedit_commands/init.lua
index 37903d7..7db138b 100644
--- a/worldedit_commands/init.lua
+++ b/worldedit_commands/init.lua
@@ -93,14 +93,6 @@ function worldedit.player_axis(name)
 	return "z", dir.z > 0 and 1 or -1
 end
 
-local function mkdir(path)
-	if minetest.mkdir then
-		minetest.mkdir(path)
-	else
-		os.execute('mkdir "' .. path .. '"')
-	end
-end
-
 local function check_filename(name)
 	return name:find("^[%w%s%^&'@{}%[%],%$=!%-#%(%)%%%.%+~_]+$") ~= nil
 end
@@ -1115,7 +1107,7 @@ minetest.register_chatcommand("/save", {
 
 		local path = minetest.get_worldpath() .. "/schems"
 		-- Create directory if it does not already exist
-		mkdir(path)
+		minetest.mkdir(path)
 
 		local filename = path .. "/" .. param .. ".we"
 		local file, err = io.open(filename, "wb")
@@ -1282,7 +1274,7 @@ minetest.register_chatcommand("/mtschemcreate", {
 
 		local path = minetest.get_worldpath() .. "/schems"
 		-- Create directory if it does not already exist
-		mkdir(path)
+		minetest.mkdir(path)
 
 		local filename = path .. "/" .. param .. ".mts"
 		local ret = minetest.create_schematic(worldedit.pos1[name],
diff --git a/worldedit_commands/mark.lua b/worldedit_commands/mark.lua
index 9d41bda..fa588d6 100644
--- a/worldedit_commands/mark.lua
+++ b/worldedit_commands/mark.lua
@@ -64,7 +64,7 @@ worldedit.mark_region = function(name)
 
 		local vec = vector.subtract(pos2, pos1)
 		local maxside = math.max(vec.x, math.max(vec.y, vec.z))
-		local limit = tonumber(minetest.setting_get("active_object_send_range_blocks")) * 16
+		local limit = tonumber(minetest.settings:get("active_object_send_range_blocks")) * 16
 		if maxside > limit * 1.5 then
 			-- The client likely won't be able to see the plane markers as intended anyway,
 			-- thus don't place them and also don't load the area into memory
@@ -101,7 +101,7 @@ worldedit.mark_region = function(name)
 					visual_size={x=sizez * 2, y=sizey * 2},
 					collisionbox = {-thickness, -sizey, -sizez, thickness, sizey, sizez},
 				})
-				marker:setyaw(math.pi / 2)
+				marker:set_yaw(math.pi / 2)
 				marker:get_luaentity().player_name = name
 				table.insert(markers, marker)
 			end
diff --git a/worldedit_gui/init.lua b/worldedit_gui/init.lua
index 181adf6..424d61f 100644
--- a/worldedit_gui/init.lua
+++ b/worldedit_gui/init.lua
@@ -70,7 +70,7 @@ local get_formspec = function(name, identifier)
 end
 
 --implement worldedit.show_page(name, page) in different ways depending on the available APIs
-if rawget(_G, "unified_inventory") then --unified inventory installed
+if minetest.global_exists("unified_inventory") then -- unified inventory installed
 	local old_func = worldedit.register_gui_function
 	worldedit.register_gui_function = function(identifier, options)
 		old_func(identifier, options)
@@ -103,7 +103,7 @@ if rawget(_G, "unified_inventory") then --unified inventory installed
 			player:set_inventory_formspec(get_formspec(name, page))
 		end
 	end
-elseif rawget(_G, "inventory_plus") then --inventory++ installed
+elseif minetest.global_exists("inventory_plus") then -- inventory++ installed
 	minetest.register_on_joinplayer(function(player)
 		local can_worldedit = minetest.check_player_privs(player:get_player_name(), {worldedit=true})
 		if can_worldedit then
@@ -134,7 +134,7 @@ elseif rawget(_G, "inventory_plus") then --inventory++ installed
 			inventory_plus.set_inventory_formspec(player, get_formspec(name, page))
 		end
 	end
-elseif rawget(_G, "smart_inventory") then -- smart_inventory installed
+elseif minetest.global_exists("smart_inventory") then -- smart_inventory installed
 	-- redefinition: Update the code element on inventory page to show the we-page
 	function worldedit.show_page(name, page)
 		local state = smart_inventory.get_page_state("worldedit_gui", name)
@@ -183,7 +183,7 @@ elseif rawget(_G, "smart_inventory") then -- smart_inventory installed
 		smartfs_callback = smart_worldedit_gui_callback,
 		sequence = 99
 	})
-elseif rawget(_G, "sfinv") then --sfinv installed (part of minetest_game since 0.4.15)
+elseif minetest.global_exists("sfinv") then -- sfinv installed
 	assert(sfinv.enabled)
 	local orig_get = sfinv.pages["sfinv:crafting"].get
 	sfinv.override_page("sfinv:crafting", {