Index: util/grub.d/30_os-prober.in
===================================================================
--- util/grub.d/30_os-prober.in	(revision 2402)
+++ util/grub.d/30_os-prober.in	(working copy)
@@ -22,6 +22,10 @@
 
 . ${libdir}/grub/grub-mkconfig_lib
 
+if [ "x${GRUB_DISABLE_OS_PROBER}" = "xtrue" ]; then
+  exit 0
+fi
+
 if [ -z "`which os-prober 2> /dev/null`" -o -z "`which linux-boot-prober 2> /dev/null`" ] ; then
   # missing os-prober and/or linux-boot-prober
   exit 0