diff --git a/luprex/cpp/core/drivenengine.cpp b/luprex/cpp/core/drivenengine.cpp
index 1c64e525..fea88b8f 100644
--- a/luprex/cpp/core/drivenengine.cpp
+++ b/luprex/cpp/core/drivenengine.cpp
@@ -444,8 +444,7 @@ void DrivenEngine::drv_get_animation_queues(uint32_t count, const int64_t *ids,
 //////////////////////////////////////////////////////////////////////////////
 
 void DrivenEngine::drv_initialize(uint32_t srcpklen, const char *srcpk, int argc, char **argv) {
-    drv_set_lua_source_pack(srcpklen, srcpk);
-    event_init(argc, argv);
+    event_init(std::string_view(srcpk, srcpklen), argc, argv);
 }
 
 void DrivenEngine::drv_clear_new_outgoing() {
diff --git a/luprex/cpp/core/drivenengine.hpp b/luprex/cpp/core/drivenengine.hpp
index 2591b459..0c43b222 100644
--- a/luprex/cpp/core/drivenengine.hpp
+++ b/luprex/cpp/core/drivenengine.hpp
@@ -144,7 +144,7 @@ public:
     // The init callback.  You may override this in a subclass.
     // This will be called once at program initialization.
     //
-    virtual void event_init(int argc, char *argv[]) {}
+    virtual void event_init(std::string_view srcpk, int argc, char *argv[]) {}
 
     // The update callback.  You may override this in a subclass.
     // This will be called whenever anything changes.
diff --git a/luprex/cpp/core/lpxclient.cpp b/luprex/cpp/core/lpxclient.cpp
index 872d4a25..5463dd7c 100644
--- a/luprex/cpp/core/lpxclient.cpp
+++ b/luprex/cpp/core/lpxclient.cpp
@@ -69,7 +69,7 @@ public:
         channel_.reset();
     }
 
-    virtual void event_init(int argc, char *argv[]) {
+    virtual void event_init(std::string_view srcpk, int argc, char *argv[]) {
         // Put the world into the starting state.
         set_initial_state();
 
@@ -78,10 +78,6 @@ public:
 
         // Set the console prompt
         set_console_prompt(console_.get_prompt());
-
-        // The driver loads the lua source automatically.
-        // However, we don't need it.  Throw it out.
-        get_lua_source_pack();
     }
 
     void send_invocation(const Invocation &inv) {
diff --git a/luprex/cpp/core/lpxserver.cpp b/luprex/cpp/core/lpxserver.cpp
index 0134d562..729fa063 100644
--- a/luprex/cpp/core/lpxserver.cpp
+++ b/luprex/cpp/core/lpxserver.cpp
@@ -31,12 +31,12 @@ public:
     Gui gui_;
 
 public:
-    virtual void event_init(int argc, char *argv[]) {
+    virtual void event_init(std::string_view srcpk, int argc, char *argv[]) {
         // Create the master world model.
         master_.reset(new World(WORLD_TYPE_MASTER));
 
         // Update the source code of the master model.
-        master_->update_source(get_lua_source_pack());
+        master_->update_source(srcpk);
 
         // Create an actor for administrative commands.
         admin_id_ = master_->create_login_actor();