option('deprecation_flags', type: 'boolean', value: false, description: 'use *_DISABLE_DEPRECATED flags')
option('session_selector', type: 'boolean', value: false, description: 'enable building a custom session selector dialog')
option('systemduserunitdir', type: 'string', description: 'Directory for systemd user service files')
option('docbook', type: 'boolean', value: true, description: 'build documentation')
option('man', type: 'boolean', value: true, description: 'build documentation (requires xmlto)')
option('x11', type: 'boolean', value: true, description: 'enable x11 session support')