login: no pam_unix.so found

[Bramble Whisper]

hi all
  I made a FreeSBIE 2.0 iso from freebsd ports, the system is 7.0 and
ports is current.
  I use nearly the MINIMAL config with NO_PAM, NO_KLDLOAD and
NO_MODULES commented.
  Also, I use my minimal kernel which can boot my box.
  Now, the iso can boot with cd9660, geom_label, geom_uzip, geom_md
added manually during loader time.
  However, I cannot login, and it shows an error with "login: in
openpam_load_module(): no pam_unix.so found".

  I've checked the uzip/usr.uzip and found lots of pam_xxx.so
including pam_unix.so in lib.
  Then I build a iso with NO_COMPRESSEDFS but still in vain.

  Do I miss anything ?
-- 
best wishes
whisper :)