diff --git a/.github/workflows/build_test.yml b/.github/workflows/build_test.yml
index b3adffd..0c4545f 100644
--- a/.github/workflows/build_test.yml
+++ b/.github/workflows/build_test.yml
@@ -37,6 +37,7 @@ jobs:
         cd $HOME/ros2_ws
         cd $HOME/ros2_ws/src
         ln -s $GITHUB_WORKSPACE
+        ls
         cd $HOME/ros2_ws
         wstool init src src/grid_map_geo/dependencies.rosinstall
         wstool update -t src -j4