_zdir-librarian_ is the background daemon for [zdir](https://github.com/indium114/zdir) ([crates.io](https://crates.io/crates/zdir))
Write the following unit file as `~/.config/systemd/user/zdir-librarian.service`:
```systemd
[Unit]
Description=zdir-librarian
[Service]
ExecStart=zdir-librarian
[Install]
WantedBy=default.target
```
Then, enable and start the service.
```shell
systemctl enable --now --user zdir-librarian.service
```