diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 6c474c6..7405c0d 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -18,8 +18,9 @@ jobs:
           colcon-defaults: |
             {
               "build": {
-                "merge-install": true,
-                "cmake-target": "install"
+                "cmake-target": "install",
+                "merge-install": true
+                ]
               }
             }
       - name: checkout
@@ -34,5 +35,6 @@ jobs:
         run: |
           . /opt/ros/rolling/setup.bash
           . install/setup.bash
+          cat /home/runner/work/ros-drake-vendor/ros-drake-vendor/ros_ws/install/share/drake/cmake/drake-extras.cmake
           colcon graph
-          colcon build --merge-install --packages-select drake_cmake_installed drake_cmake_installed_apt drake_ament_cmake_installed --event-handlers=console_direct+
+          colcon build --merge-install --packages-select drake_cmake_installed drake_cmake_installed_apt drake_ament_cmake_installed --event-handlers=console_direct+ --cmake-args --trace-expand --trace-source=/home/runner/work/ros-drake-vendor/ros-drake-vendor/ros_ws/install/share/drake/cmake/drake-extras.cmake 
diff --git a/drake-extras.cmake b/drake-extras.cmake
index 8caeeda..e843820 100644
--- a/drake-extras.cmake
+++ b/drake-extras.cmake
@@ -14,4 +14,8 @@ unset(drake_DIR CACHE)
 # The relative path should drive us to the root of the drake
 # upstream installation done under ROS.
 set(drake_path "${drake_DIR}/../../../opt/drake")
+
+message(STATUS "drake_path: ${drake_path}")
+get_filename_component(abs_path ${drake_path} ABSOLUTE)
+message(STATUS "Absolute path of drake_path: ${abs_path}")
 find_package(drake PATHS ${drake_path} NO_DEFAULT_PATH)