diff -Naur eglibc-2.15-16526.orig/config.make.in eglibc-2.15-16526/config.make.in
--- eglibc-2.15-16526.orig/libc/config.make.in	2012-07-24 17:49:58.000000000 -0400
+++ eglibc-2.15-16526/libc/config.make.in	2012-07-24 17:51:01.000000000 -0400
@@ -5,7 +5,7 @@
 release = @RELEASE@

 # Installation prefixes.
-install_root = $(DESTDIR)
+install_root ?= $(DESTDIR)
 prefix = @prefix@
 exec_prefix = @exec_prefix@
 datadir = @datadir@