Use of Multistrap with file: repositories

Hi,

I cannot seem to make multistrap (2.1.13 from svn) work with a (flat)
'file:' repository on my system (running under ubuntu 10.04).

It first runs 

  apt-get ... update

followed by
      
  apt-get ... -o Apt::Get::Download-Only=true .. install <packages>

The apt-get from ubuntu 10.04 does nothing for packages residing in
'file:' repositories (i.e. does not copy them to
chroot/var/cache/apt/archives).  So in the next (unpack/install) step
multistrap just ignores those packages.

Is this a problem with ubuntu 10.04's apt-get, or with multistrap
2.1.13?  Any workaround other than moving my files into a directory
served by apache?

thanks for any help, 
cheers,

David
-- 
GnuPG public key: http://user.cs.tu-berlin.de/~dvdkhlng/dk.gpg
Fingerprint: B17A DC95 D293 657B 4205  D016 7DEF 5323 C174 7D40

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.10 (GNU/Linux)

iD8DBQFNzAb6fe9TI8F0fUARAknTAJwN9S5T8ARuGOd0wGGPQRd01IS2yACfcetS
XJq5LVAnOiSoBvYLmKmXZXM=
=PmPq
-----END PGP SIGNATURE-----