I'm using apticron to notify myself about available updates. However, I've got an installation on a VPN that seems to notify about packages I DON'T have installed. For example, it keeps (daily) suggesting that I upgrade sysvinit - I have upstart installed, not sysvinit. I used to have it for a number of other packages (basic libraries that weren't installed in my original Debian-wheezy image), so I've shut up those warnings just by installing the libraries. However, I don't really want to ditch upstart for sysvinit just to make apticron play more nicely.
Any ideas how to make it stop?