diff --git a/put-multiarch/put-multiarch.sh b/put-multiarch/put-multiarch.sh
index 9312ebf..0d24e90 100755
--- a/put-multiarch/put-multiarch.sh
+++ b/put-multiarch/put-multiarch.sh
@@ -28,6 +28,6 @@ if [ -t 1 ]; then
 fi
 
 dir="$(dirname "$BASH_SOURCE")"
-img="$(docker build -q "$dir")"
+img="$(docker build -q -t oi/put-multiarch --cache-from oi/put-multiarch "$dir")"
 
 exec docker run --rm --init "${args[@]}" "$img" "$@"