diff -r 9ea1b5021fc7 -r 88429fc393d9 scripts/build/libc/glibc-eglibc.sh-common
--- a/scripts/build/libc/glibc-eglibc.sh-common	Thu Oct 11 14:39:42 2012 +1000
+++ b/scripts/build/libc/glibc-eglibc.sh-common	Thu Oct 11 14:39:42 2012 +1000
@@ -5,7 +5,10 @@
     local addon
 
     # Extract the main tarball
-    CT_Extract "${CT_LIBC}-${CT_LIBC_VERSION}"
+    if [ "${CT_LIBC_CUSTOM}" != "y" \
+         -o ! -d "${CT_LIBC_CUSTOM_LOCATION}" ]; then
+        CT_Extract "${CT_LIBC}-${CT_LIBC_VERSION}"
+    fi
     CT_Pushd "${CT_SRC_DIR}/${CT_LIBC}-${CT_LIBC_VERSION}"
     CT_Patch nochdir "${CT_LIBC}" "${CT_LIBC_VERSION}"