Preparing to replace fonts-arphic-ukai 0.2.20080216.2-3ubuntu1 (using .../fonts-arphic-ukai_0.2.20080216.2-3ubuntu2_all.deb) ...
Unpacking replacement fonts-arphic-ukai ...
Preparing to replace python-novaclient 1:2.9.0-0ubuntu1 (using .../python-novaclient_1%3a2.11.1-0ubuntu1_all.deb) ...
Unpacking replacement python-novaclient ...
Processing triggers for fontconfig ...
Processing triggers for man-db ...
Setting up fonts-arphic-ukai (0.2.20080216.2-3ubuntu2) ...
Setting up postfix (2.10.0-2) ...
postconf: fatal: open /etc/postfix/main.cf: No such file or directory
dpkg: error processing postfix (--configure):
 subprocess installed post-installation script returned error exit status 1