The following NEW packages will be installed:
  xserver-xfree86
0 upgraded, 1 newly installed, 0 to remove and 2 not upgraded.
5 not fully installed or removed.
Need to get 0B/5742kB of archives.
After unpacking 16.0MB of additional disk space will be used.
Preconfiguring packages ...
--output-fd: unknown option
debconf: whiptail output to the above errors, giving up!

(Reading database ... 16526 files and directories currently installed.)
Unpacking xserver-xfree86 (from .../xserver-xfree86_4.3.0.dfsg.1-14_i386.deb) ...
Received signal.  Aborting xserver-xfree86 package config script.

--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 (--unpack):
 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
E: Sub-process /usr/bin/dpkg returned an error code (1)
debian:~# Received signal.  Aborting xserver-xfree86 package config script.