def options(opt):
    """
	Adds the ``--gsettingsschemadir`` command-line option
	"""
    gr = opt.add_option_group('Installation directories')
    gr.add_option('--gsettingsschemadir', help=
        'GSettings schema location [DATADIR/glib-2.0/schemas]', default='',
        dest='GSETTINGSSCHEMADIR')
