diff --git a/chroot_version_hooks.d/153_rewrite_sudoers.d b/chroot_version_hooks.d/153_rewrite_sudoers.d
index bc6fcf9..2a11b7a 100644
--- a/chroot_version_hooks.d/153_rewrite_sudoers.d
+++ b/chroot_version_hooks.d/153_rewrite_sudoers.d
@@ -12,6 +12,9 @@
   # explicitly bounces up to root for everything it does- that way
   # if anyone introduces a temp depriving in the sudo setup, it can't break
   # mid upgrade.
+
+  . "$(dirname "$(dirname "$0")")/common.sh" || exit 1
+
   load_environment_whitelist
   exec sudo bash "$0" / "${USER}" "${ENVIRONMENT_WHITELIST[@]}"
   exit 1