option('enable-browser-plugin', type: 'boolean', value: true, description: 'Enable extensions.gnome.org browser plugin' ) option('enable-documentation', type: 'boolean', value: false, description: 'Build API reference' ) option('enable-man', type: 'boolean', value: true, description: 'Generate man pages' ) option('enable-networkmanager', type: 'combo', choices: ['yes', 'no', 'auto'], value: 'auto', description: 'Enable NetworkManager support' ) option('enable-systemd', type: 'combo', choices: ['yes', 'no', 'auto'], value: 'auto', description: 'Enable systemd integration' )