+NS3_HINT (empty by default)
+ Alternative path into which ns-3 should be searched for.
+
+SIMGRID_PYTHON_LIBDIR (auto-detected)
+ Where to install the Python module library. By default, it is set to the cmake Python3_SITEARCH variable if installing to /usr,
+ and a modified version of that variable if installing to another path. Just force another value if the auto-detected default
+ does not fit your setup.
+