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