diff --git a/alpine-make-vm-image b/alpine-make-vm-image
index 52f6c72..220d67e 100755
--- a/alpine-make-vm-image
+++ b/alpine-make-vm-image
@@ -143,7 +143,8 @@ attach_image() {
 		nbd_dev=$(get_available_nbd)
 	} || die 'No available nbd device found!'
 
-	qemu-nbd --connect="$nbd_dev" ${format:+--format=$format} "$image" \
+	qemu-nbd --connect="$nbd_dev" --cache=writeback \
+		${format:+--format=$format} "$image" \
 		&& echo "$nbd_dev"
 }