diff --git a/.github/workflows/systemtests.yml b/.github/workflows/systemtests.yml
index 332fbea5b..c512485e8 100644
--- a/.github/workflows/systemtests.yml
+++ b/.github/workflows/systemtests.yml
@@ -24,6 +24,7 @@ jobs:
           path: ros2_ws/src/crazyswarm2
       - name: Build workspace
         run: |
+          source /opt/ros/humble/setup.bash
           cd ros2_ws
           colcon build --symlink-install