@Parameter
    protected String vm;

    /**
     * Enable or disable provisioning.
     */
    @Parameter(defaultValue = "true")
    protected boolean provision;

    /**
     * Enable only certain provisioners, by type.
     */
    @Parameter
    protected List<String> provisioners;

    @Override
    protected void doExecute() throws IOException, ScriptException {

        final List<String> args = new ArrayList<String>();

        args.add(NAME);

        if (!isEmpty(vm))
            args.add(vm);

        if (!provision)
            args.add("--no-provision");

        else if (provisioners != null && !provisioners.isEmpty()) {
            args.add("--provision");
            args.add("--provision-with");
            args.add(join(provisioners.iterator(), ","));

        } else
            args.add("--provision");

        cli(args);
    }
}