It doesn't us pam_wheel correctly (it still prompts for the password.)
In fact, stracing it reveals it isn't even reading the pam config
files, even though it's linked against pam.
autoconf is getting too picky...
Had to change
AC_DEFINE(USE_PAM, 1, [Define if you want to use PAM])
to get USE_PAM defined.
This will be fixed in the next build (some more pending fixes)