gentoo-overlay/dev-util/buildbot/files/buildbot.service

[Unit]
Description=buildbot master daemon
After=local-fs.target network.target

[Service]
Type=forking
User=buildbot
WorkingDirectory=/var/lib/buildmaster
# The following assume there is a 'master' directory
# in $WorkingDirectory with the master configuration files
ExecStartPre=/usr/bin/buildbot checkconfig master
ExecStart=/usr/bin/buildbot start master
ExecStop=/usr/bin/buildbot stop master

[Install]
WantedBy=multi-user.target