It's an optional dependency, which you activate at compilation time with `./conf...

Oomoo0sh on Sept 16, 2020 | parent | context | favorite | on: Debian network-manager: Please restore removed ini...

It's an optional dependency, which you activate at compilation time with `./configure --enable-systemd`. So on systems where users don't control build flags, D-Bus dependency on systemd is a decision made by maintainer.