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

[Unit]
Description=buildbot slave instances
After=local-fs.target network.target

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

[Install]
WantedBy=multi-user.target