diff --git a/scripts/tweak-dpkg-config b/scripts/tweak-dpkg-config
new file mode 100755
index 0000000..560ba5b
--- /dev/null
+++ b/scripts/tweak-dpkg-config
@@ -0,0 +1,14 @@
+#!/bin/sh -eu
+# tweak-dpkg-config -- for use in a Docker image
+# Copyright (C) 2017  Olaf Meeuwissen
+#
+# License: GPL-3.0+
+
+cfg=/etc/dpkg/dpkg.cfg.d
+
+cat > $cfg/docker-no-sync <<EOF
+force-unsafe-io
+EOF
+chmod 0644 $cfg/docker-no-sync
+
+rm $0