warnings from `import DDG4`

when in an eic-shell container, I get the following warnings from python when importing DDG4:

jug_xl> python

Python 3.10.4 (main, Jul 20 2022, 20:36:23) [GCC 11.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.

>>> import DDG4

/usr/local/lib/cppyy_backend/loader.py:107: UserWarning: No precompiled header available (/usr/local/lib/cppyy_backend/etc not writable); this may impact performance.
  warnings.warn('No precompiled header available (%s); this may impact performance.' % msg)

They can also be seen in epic CI logs, such as check-overlap-geant (from the checkOverlaps.py call)