pb apt-get distupgrade

[brunoml@free.fr]

Bonsoir,

Un apt-get dist-upgrade sous Sid a planté avec le message ci-dessous. Depuis, si je
relance apt-get dist-upgrade, j'obtiens toujours ce même message que je ne comprend
pas :

rapido:~# apt-get dist-upgrade
Reading Package Lists... Done
Building Dependency Tree... Done
Calculating Upgrade... Done
The following packages have been kept back
  mc
0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.
1 not fully installed or removed.
Need to get 0B of archives.
After unpacking 0B of additional disk space will be used.
Do you want to continue? [Y/n] y
Setting up ssh (3.6.1p2-11) ...
Disabling protocol version 1. Could not load host key
sshd: no hostkeys available -- exiting.
invoke-rc.d: initscript ssh, action "restart" failed.
dpkg: error processing ssh (--configure):
 subprocess post-installation script returned error exit status 1
Errors were encountered while processing:
 ssh
E: Sub-process /usr/bin/dpkg returned an error code (1)

Merci !
Bruno