diff --git a/.github/workflows/ubuntu_test.yml b/.github/workflows/ubuntu_test.yml
index 579d5a2485e..f140db52bb1 100644
--- a/.github/workflows/ubuntu_test.yml
+++ b/.github/workflows/ubuntu_test.yml
@@ -73,7 +73,7 @@ jobs:
       - name: Build Upstream Workspace
         shell: bash
         run: |
-          ./.github/workflows/add_ros_apt_sources.sh
+          .${{ github.workspace }}/target_ws/src/.github/workflows/add_ros_apt_sources.sh
           apt install -y liboctomap-dev libfcl-dev libconsole-bridge-dev libbullet-dev libbullet-extras-dev libyaml-cpp-dev libtinyxml2-dev libassimp-dev liborocos-kdl-dev libpcl-dev liblapack-dev libboost-dev libboost-filesystem-dev libboost-serialization-dev libboost-program-options-dev libboost-graph-dev libbenchmark-dev libccd-dev libgtest-dev
           mkdir -p ${{ github.workspace }}/upstream_ws/src
           vcs import --input "dependencies.repos" ${{ github.workspace }}/upstream_ws/src/