option('utils',
  type : 'array',
  value : ['all'],
  choices : [
    'all',
    'patch',
    'diff',
    'cmp',
    'diff3',
    'sdiff',
    'which',
    'gzip',
    'grep',
    'find',
    'xargs',
    'lspci',
    'setpci',
  ],
  description : 'Utilities to include in vx (default: all)'
)