utilite: no /sbin/mount.cifs in the image

I am trying out volumio on my utilite for the first time. I cannot mount the cifs share form my nas.
After not getting it done in the web-UI I logged in via ssh and tried from the command lin with something like (after having cerated /mnt/tmp):
mount -t cifs /// /mnt/tmp -o
where is my nas hostname,
is the sahre and
are the same options I use when I mount the share on my linux box.
The result is:
mount: wrong fs type, bad option, bad superblock on …,
missing codepage or helper program, or other error
(for several filesystems (e.g. nfs, cifs) you might
need a /sbin/mount. helper program)
In some cases useful info is found in syslog - try
dmesg | tail or so

and when i check in /sbin where the mount helpers reside (e.g. mount.nfs etc) I can see no mount.cifs.
How do cifs mounts work in volumio?