debian:~# dpkg -i --force-all /var/cache/apt/archives/xserver-xfree86_4.3.0.dfsg.1-14_i386.deb
(Reading database ... 16526 files and directories currently installed.)
Unpacking xserver-xfree86 (from .../xserver-xfree86_4.3.0.dfsg.1-14_i386.deb) ...
--output-fd: unknown option
debconf: whiptail output to the above errors, giving up!
dpkg: error processing /var/cache/apt/archives/xserver-xfree86_4.3.0.dfsg.1-14_i386.deb (--install):
 subprocess pre-installation script returned error exit status 255

Errors were encountered while processing:
 /var/cache/apt/archives/xserver-xfree86_4.3.0.dfsg.1-14_i386.deb
debian:~# Received signal.  Aborting xserver-xfree86 package config script.