While your patch is not yet implemented, I fixed the problem on my system by setting up a symbolic link as follows.
#mkdir /usr/lib/notify-osd #ln -s /usr/lib/x86_64-linux-gnu/notify-osd /usr/lib/notify-osd/notify-osd Tony Debian Stretch, Linux 4.9, SDDM 0.18, Openbox 3.6, Conky 1.10 Sent with [ProtonMail](https://protonmail.com) Secure Email.
