option('build_testing', type: 'boolean', value: false) option('build_examples', type: 'boolean', value: false) option('wren_with_rand', type: 'boolean', value: false, yield: true) option('wren_with_meta', type: 'boolean', value: false, yield: true) option('wrenpp_with_python', type: 'feature', value: 'disabled')