diff --git a/live-build/buildd/hooks/00-mirror.binary b/live-build/buildd/hooks/00-mirror.binary
index a6722e0b..202563d1 100755
--- a/live-build/buildd/hooks/00-mirror.binary
+++ b/live-build/buildd/hooks/00-mirror.binary
@@ -9,4 +9,4 @@ set -e
 # /var/lib/apt/lists/ has suitable cached Packages files; this speeds up
 # builds on buildds.
 sed -i "s,${LB_PARENT_MIRROR_BINARY},${LB_MIRROR_BINARY},g" \
-	chroot/etc/apt/sources.list
+    $(find chroot/etc/apt/ -name '*.list' -o -name '*.sources')