derb --version (return code: 0)
derb version 1.1 (ICU version 55.1).
Copyright (C) 2015, International Business Machines Corporation and others. All Rights Reserved.
derb --help (return code: 0)
Usage: derb [ -h, -?, --help ] [ -V, --version ]
[ -v, --verbose ] [ -e, --encoding encoding ] [ --bom ]
[ -t, --truncate [ size ] ]
[ -s, --sourcedir source ] [ -d, --destdir destination ]
[ -i, --icudatadir directory ] [ -c, --to-stdout ]
[ -A, --suppressAliases]
bundle ...