Замена rsyslog на syslog-ng зависит от sylog-ng-core

Я пытаюсь заменить по умолчанию syslog от syslog-ng,

syslog-ng это наш стандарт, и мы хотим использовать это syslog агент.

root@VirtualBox:~# apt-get install syslog-ng
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 syslog-ng : Depends: syslog-ng-core (>= 3.5.3)
             Depends: syslog-ng-mod-sql
             Depends: syslog-ng-mod-mongodb
             Depends: syslog-ng-mod-json
             Recommends: syslog-ng-mod-smtp
             Recommends: syslog-ng-mod-amqp
             Recommends: syslog-ng-mod-geoip
             Recommends: syslog-ng-mod-redis
             Recommends: syslog-ng-mod-stomp
E: Unable to correct problems, you have held broken packages.