Deb install complains that zfs is not installed

[skrzepto]

After following https://github.com/zfsonlinux/zfs/wiki/Debian to install zfs and then went to install
zfs watcher with the provided .deb file i get this issue

➜  Downloads sudo apt install zfs-dkms
Reading package lists... Done
Building dependency tree       
Reading state information... Done
zfs-dkms is already the newest version.
You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies:
 zfswatcher : Depends: zfs but it is not installable or
                       ubuntu-zfs but it is not installable or
                       debian-zfs but it is not installable
              Recommends: ledmon but it is not going to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).

System Info

OS: Debian GNU/Linux 8.7 (jessie) x86_64
Kernel: 3.16.0-4-amd64