Python executable path empty through rlm_python and rlm_python3

Hi! Running sys.executable in a Python script run through either rlm_python or rlm_python3 returns null - from what I can tell Python normally gets this information from argv[0](usually passed by the OS) and/or some environment variables. I've confirmed this works fine when the python script is run on it's own (not through FreeRADIUS). Is this a bug or is there a way to configure this? I need it to be set for a library we use. Thanks! -Allie