option('vendor-conf-file', type: 'string', description: 'points to a keyfile containing vendor customization, use this only to override the usual search path' ) option('ibus', description: 'enable support for IBus', type: 'feature', value: 'auto' ) option('systemd', type: 'boolean', value: true, description: 'Enable systemd integration' ) option('parental_controls', type: 'feature', value: 'auto', description: 'Enable parental controls pages', )