diff --git a/unity.inc.php b/unity.inc.php
index cd3133c..3a6e5ac 100644
--- a/unity.inc.php
+++ b/unity.inc.php
@@ -36,7 +36,7 @@ function unity_exec($func, $build_target = "", $quit = true, $batchmode = true)
 {
   global $GAME_ROOT;
 
-  $proj_path = normalize_path("$GAME_ROOT/");
+  $proj_path = normalize_path(get("UNITY_ASSETS_DIR") . '/../');
 
   $log_file = "$GAME_ROOT/build/unity.log";
   ensure_rm($log_file);