This test fails when using dash as /bin/sh.

This workaround is also being used by Guix.
--- findutils-4.8.0/tests/xargs/verbose-quote.sh.old	2021-01-01 18:46:51.000000000 -0600
+++ findutils-4.8.0/tests/xargs/verbose-quote.sh	2021-09-11 01:01:01.090000000 -0500
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 # Verify that 'xargs -t' quotes the command properly when needed.
 
 # Copyright (C) 2019-2021 Free Software Foundation, Inc.