diff --git a/src/KingSystem/CMakeLists.txt b/src/KingSystem/CMakeLists.txt
index 1aba9d67..e96be084 100644
--- a/src/KingSystem/CMakeLists.txt
+++ b/src/KingSystem/CMakeLists.txt
@@ -1,14 +1,16 @@
+# Build these first because it contains many source files that take a long time to build.
+add_subdirectory(GameData)
+add_subdirectory(Resource)
+
 add_subdirectory(ActorSystem)
 add_subdirectory(Ecosystem)
 add_subdirectory(Event)
 add_subdirectory(Damage)
 add_subdirectory(Framework)
-add_subdirectory(GameData)
 add_subdirectory(Map)
 add_subdirectory(MessageSystem)
-add_subdirectory(Resource)
 add_subdirectory(Sound)
 add_subdirectory(System)
 add_subdirectory(Terrain)
 add_subdirectory(Utils)
-add_subdirectory(World)
\ No newline at end of file
+add_subdirectory(World)