diff --git a/builtin/init.lua b/builtin/init.lua
index 519a7483b..c0ba5f400 100644
--- a/builtin/init.lua
+++ b/builtin/init.lua
@@ -76,9 +76,10 @@ elseif INIT == "async_game" then
 	dofile(asyncpath .. "game.lua")
 elseif INIT == "client" then
 	dofile(scriptdir .. "client" .. DIR_DELIM .. "init.lua")
-elseif INIT == "sscsm" then
-	-- FIXME: different branch for sscsm_server
+elseif INIT == "sscsm" and core.get_current_modname() == "*client_builtin*" then
 	dofile(scriptdir .. "sscsm_client" .. DIR_DELIM .. "init.lua")
+elseif INIT == "sscsm" and core.get_current_modname() == "*server_builtin*" then
+	dofile(scriptdir .. "sscsm_server" .. DIR_DELIM .. "init.lua")
 elseif INIT == "emerge" then
 	dofile(scriptdir .. "emerge" .. DIR_DELIM .. "init.lua")
 elseif INIT == "pause_menu" then
diff --git a/src/script/sscsm/sscsm_environment.h b/src/script/sscsm/sscsm_environment.h
index 643e49fcd..e929fab75 100644
--- a/src/script/sscsm/sscsm_environment.h
+++ b/src/script/sscsm/sscsm_environment.h
@@ -20,11 +20,11 @@ class SSCSMEnvironment : public Thread
 {
 	std::shared_ptr<StupidChannel> m_channel;
 	std::unique_ptr<SSCSMScripting> m_script;
-	// virtual file system.
-	// TODO: decide and doc how paths look like, maybe:
-	// /client_builtin/subdir/foo.lua
-	// /server_builtin/subdir/foo.lua
-	// /mods/modname/subdir/foo.lua
+	// the virtual file system.
+	// paths look like this:
+	// *client_builtin*:subdir/foo.lua
+	// *server_builtin*:subdir/foo.lua
+	// modname:subdir/foo.lua
 	std::unique_ptr<ModVFS> m_vfs;
 
 	void *run() override;