diff --color -ur orocos_kinematics_dynamics-1.5.1/python_orocos_kdl/CMakeLists.txt orocos_kinematics_dynamics-1.5.1.pybind11/python_orocos_kdl/CMakeLists.txt
--- orocos_kinematics_dynamics-1.5.1/python_orocos_kdl/CMakeLists.txt	2021-09-12 08:58:27.000000000 +0200
+++ orocos_kinematics_dynamics-1.5.1.pybind11/python_orocos_kdl/CMakeLists.txt	2022-04-12 14:43:07.095815770 +0200
@@ -46,7 +46,7 @@
   set(PYTHON_MODULE_EXTENSION ".so")
 endif()
 
-add_subdirectory(pybind11)
+find_package(pybind11)
 pybind11_add_module(${LIBRARY_NAME}
   PyKDL/PyKDL.h
   PyKDL/PyKDL.cpp