apt not upgrading package

[Nils Kassube]

Colin Law wrote:
> I have added a ppa for mosquitto, when I run
> sudo apt-get update && sudo apt-get dist-upgrade
> it says:
> 0 to upgrade, 0 to newly install, 0 to remove and 0 not to upgrade.
> but apt-cache policy for mosquitto shows:
> $ apt-cache policy mosquitto
> mosquitto:
>   Installed: 1.4.8-1build1
>   Candidate: 1.4.9-0mosquitto1
>   Version table:
>      1.4.9-0mosquitto1 500
>         500
> http://ppa.launchpad.net/mosquitto-dev/mosquitto-ppa/ubuntu
> xenial/main amd64 Packages
>  *** 1.4.8-1build1 500
>         500 http://gb.archive.ubuntu.com/ubuntu xenial/universe amd64
> Packages 100 /var/lib/dpkg/status
> 
> Which says there is a candidate for update.  I cannot see why apt-get
> does not offer the upgrade.  If mosquitto were held then I think
> apt-get would show it as held back.  Any suggestions as to what is
> going on?

Could it be that one of the dependencies for the new version is missing?


Nils