diff --git a/sdk_container/src/third_party/coreos-overlay/coreos/config/env/sys-apps/efunctions b/sdk_container/src/third_party/coreos-overlay/coreos/config/env/sys-apps/efunctions
new file mode 100644
index 0000000000..14e19ac0dc
--- /dev/null
+++ b/sdk_container/src/third_party/coreos-overlay/coreos/config/env/sys-apps/efunctions
@@ -0,0 +1,3 @@
+# Don't filter out /etc/init.d/functions.sh
+PKG_INSTALL_MASK="${PKG_INSTALL_MASK/\/etc\/init.d}"
+INSTALL_MASK="${INSTALL_MASK/\/etc\/init.d}"