option('tools', type: 'boolean', value: true,
       description: 'Build tools')
option('assume-mask', type: 'integer', value: 0,
       description: 'Control the assumptions made (e.g. risking security issues) in the code.')
option('yaml', type: 'feature', value: 'auto',
       description: 'YAML support')
option('valgrind', type: 'feature', value: 'auto',
       description: 'Valgrind support')
option('python', type: 'feature', value: 'auto',
       description: 'Build pylibfdt Python library')