--- old/make/autoconf/basic_tools.m4
+++ new/make/autoconf/basic_tools.m4
@@ -357,7 +357,7 @@
   AC_SUBST(IS_GNU_TIME)
 
   # Check if it's GNU date
-  check_date=`$DATE --version 2>&1 | $GREP GNU`
+  check_date=`$DATE --version 2>&1 | $GREP GNU || $DATE --version 2>&1 | $GREP BusyBox`
   if test "x$check_date" != x; then
     IS_GNU_DATE=yes
   else