The daemon is:
```
[Unit]
Description=Build daemon for GNU Guix

[Service]
ExecStart=/var/guix/profiles/per-user/root/current-guix/bin/guix-daemon --build-users-group=guixbuild
Environment='GUIX_LOCPATH=/var/guix/profiles/per-user/root/guix-profile/lib/locale' LC_ALL=en_US.utf8
RemainAfterExit=yes
StandardOutput=syslog
StandardError=syslog

# See <https://lists.gnu.org/archive/html/guix-devel/2016-04/msg00608.html>.
# Some package builds (for example, go@1.8.1) may require even more than
# 1024 tasks.
TasksMax=8192

[Install]
WantedBy=multi-user.target
```