ZoneMinder install failing on ReadyNAS 516 - libjpeg8

Hi,

I've just updated to the latest beta 6.8.0.T40 and am still getting the same error:

Jun 26 12:57:14 NAS-516 fv-app-install[8361]: fv-app-install (/tmp/nastools-zoneminder_1.30.0-nt2_amd64.deb): error code [100]: Reading package lists...
Jun 26 12:57:14 NAS-516 fv-app-install[8361]: Building dependency tree...
Jun 26 12:57:14 NAS-516 fv-app-install[8361]: Reading state information...
Jun 26 12:57:14 NAS-516 fv-app-install[8361]: Some packages could not be installed. This may mean that you have
Jun 26 12:57:14 NAS-516 fv-app-install[8361]: requested an impossible situation or if you are using the unstable
Jun 26 12:57:14 NAS-516 fv-app-install[8361]: distribution that some required packages have not yet been created
Jun 26 12:57:14 NAS-516 fv-app-install[8361]: or been moved out of Incoming.
Jun 26 12:57:14 NAS-516 fv-app-install[8361]: The following information may help to resolve the situation:
Jun 26 12:57:14 NAS-516 fv-app-install[8361]: The following packages have unmet dependencies:
Jun 26 12:57:14 NAS-516 fv-app-install[8361]: nastools-zoneminder : Depends: libjpeg8 (>= 8c) but it is not going to be installed
Jun 26 12:57:14 NAS-516 fv-app-install[8361]: E: Unable to correct problems, you have held broken packages.

Any ideas what to try next?

Regards,

Kevin