Fix "On the Way" being added with no rails

src/awards.lua

@@ -291,19 +291,6 @@ if minetest.get_modpath("default") then
 		return nil
 	end)
 
-	-- On the way
-	awards.register_award("award_on_the_way", {
-		title = S("On The Way"),
-		description = S("Place 100 rails."),
-		icon = "awards_on_the_way.png",
-		difficulty = 0.1,
-		trigger = {
-			type = "place",
-			node = "default:rail",
-			target = 100
-		}
-	})
-
 	awards.register_award("award_lumberjack_firstday", {
 		title = S("First Day in the Woods"),
 		description = S("Dig 6 tree blocks."),
@@ -790,6 +777,21 @@ if minetest.get_modpath("default") then
 	end)
 end
 
+if minetest.get_modpath("carts") then
+	-- On the way
+	awards.register_award("award_on_the_way", {
+		title = S("On The Way"),
+		description = S("Place 100 rails."),
+		icon = "awards_on_the_way.png",
+		difficulty = 0.1,
+		trigger = {
+			type = "place",
+			node = "group:rail",
+			target = 100
+		}
+	})
+end
+
 if minetest.get_modpath("bones") then
 	-- Die near bones
 	awards.register_award("award_the_stack", {