diff --git a/envsetup.sh b/envsetup.sh
index dba64ee..6ad3a9e 100644
--- a/envsetup.sh
+++ b/envsetup.sh
@@ -1355,14 +1355,20 @@
         return
     fi
     T=$(gettop)
-    if [[ ! -f $T/filelist ]]; then
+    if [ ! "$OUT_DIR" = "" ]; then
+        mkdir -p $OUT_DIR
+        FILELIST=$OUT_DIR/filelist
+    else
+        FILELIST=$T/filelist
+    fi
+    if [[ ! -f $FILELIST ]]; then
         echo -n "Creating index..."
-        (\cd $T; find . -wholename ./out -prune -o -wholename ./.repo -prune -o -type f > filelist)
+        (\cd $T; find . -wholename ./out -prune -o -wholename ./.repo -prune -o -type f > $FILELIST)
         echo " Done"
         echo ""
     fi
     local lines
-    lines=($(\grep "$1" $T/filelist | sed -e 's/\/[^/]*$//' | sort | uniq))
+    lines=($(\grep "$1" $FILELIST | sed -e 's/\/[^/]*$//' | sort | uniq))
     if [[ ${#lines[@]} = 0 ]]; then
         echo "Not found"
         return