I’m building a ROS (Humble) workspace using ‘colcon build’.

I’m getting the warning:

CMake Warning at CMakeLists.txt:22 (add_executable):
  Cannot generate a safe runtime search path for target talker because files
  in some directories may conflict with libraries in implicit directories:

    runtime library [libpython3.6m.so.1.0] in //lib64 may be hidden by files in:
      /nobackup/XXXXXXX/vobs_ros2/ros2_lin64/Python36/lib

  Some of these libraries may not be found correctly.


CMake Warning at CMakeLists.txt:25 (add_executable):
  Cannot generate a safe runtime search path for target listener because
  files in some directories may conflict with libraries in implicit
  directories:

    runtime library [libpython3.6m.so.1.0] in //lib64 may be hidden by files in:
      /nobackup/XXXXXXX/vobs_ros2/ros2_lin64/Python36/lib

  Some of these libraries may not be found correctly.

I see libpython3.6m.so.1.0 is in lib64 and in the Python local version I installed with conda: /nobackup/XXXXXXX/vobs_ros2/ros2_lin64/Python36/lib.

According to this post: CMake cannot resolve runtime directory path, setting CMAKE_PREFIX_PATH should fix the problem. But even if I set COLCON_COMMON_ARGS="--cmake-args -DCMAKE_PREFIX_PATH=/nobackup/XXXXXXX/vobs_ros2/ros2_lin64/Python36", clean, remove CMakeCache.txt and retry, warning is still shown.

What’s the good strategy to remove this warning?

Note: I printed CMAKE_PREFIX_PATH from my CMakeLists.txt to verify it’s set as expected. And I also tried with CMAKE_PREFIX_PATH=/nobackup/XXXXXXX/vobs_ros2/ros2_lin64/Python36/lib.