dpkg error, `aptitude safe-upgrade` leaves zsh unconfigured

[John Magolske <listmail@b79.net>]

After an `aptitude safe-upgrade` I'm getting the following, which
leaves zsh unconfigured. Any suggestions about how to untangle this?

*

% sudo aptitude install zsh
The following NEW packages will be installed:
  zsh-common{a}
The following partially installed packages will be configured:
  zsh zsh-doc
0 packages upgraded, 1 newly installed, 0 to remove and 438 not upgraded.
Need to get 0 B/2,964 kB of archives. After unpacking 10.4 MB will be used.
Do you want to continue? [Y/n/?] y
Retrieving bug reports... Done
Parsing Found/Fixed information... Done
(Reading database ... 267491 files and directories currently installed.)
Unpacking zsh-common (from .../zsh-common_5.0.2-3_all.deb) ...
dpkg: error processing /var/cache/apt/archives/zsh-common_5.0.2-3_all.deb (--unpack):
 trying to overwrite '/etc/zsh/zshenv', which is also in package zsh 5.0.2-3
dpkg-deb: error: subprocess paste was killed by signal (Broken pipe)
Processing triggers for menu ...
Errors were encountered while processing:
 /var/cache/apt/archives/zsh-common_5.0.2-3_all.deb
localepurge: Disk space freed in /usr/share/locale: 0 KiB
localepurge: Disk space freed in /usr/share/man: 0 KiB
localepurge: Disk space freed in /usr/share/gnome/help: 0 KiB
localepurge: Disk space freed in /usr/share/omf: 0 KiB

Total disk space freed by localepurge: 0 KiB

E: Sub-process /usr/bin/dpkg returned an error code (1)
A package failed to install.  Trying to recover:
dpkg: dependency problems prevent configuration of zsh-doc:
 zsh-doc depends on zsh-common (= 5.0.2-3); however:
  Package zsh-common is not installed.

dpkg: error processing zsh-doc (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of zsh:
 zsh depends on zsh-common (= 5.0.2-3); however:
  Package zsh-common is not installed.

dpkg: error processing zsh (--configure):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 zsh-doc
 zsh


Thanks for any help,

John


-- 
John Magolske
http://B79.net/contact