option('tracing', type: 'boolean', value: false, description: 'add extra debugging information')
option('profile', type: 'combo', choices: ['default', 'development'], value: 'default')
option('spelling', type: 'feature')
option('portal', type : 'boolean', description: 'build with xdg-portal support for ')
option('evolution', type : 'boolean', description: 'build with evolution for integration with evolution calendars')
option('goa', type : 'boolean', description: 'build with GNOME Online Accounts support for detecting linked Nextcloud/CalDAV accounts')
option('manpage', type: 'boolean', value: false, description: 'install man page')