$NetBSD$

--- configure.orig	2016-05-21 16:59:37.000000000 +0000
+++ configure
@@ -24084,7 +24084,7 @@ fi
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for Qt5 moc" >&5
 $as_echo_n "checking for Qt5 moc... " >&6; }
   mocversion=`$MOCQT5 -v 2>&1`
-  mocversiongrep=`echo $mocversion | grep "Qt 5\|moc 5"`
+  mocversiongrep=`echo $mocversion | grep -E "Qt 5|moc 5"`
   if test x"$mocversiongrep" != x"$mocversion"; then
     { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }