diff --git a/overlay/default.nix b/overlay/default.nix
index 7b033108..6cbb59a2 100644
--- a/overlay/default.nix
+++ b/overlay/default.nix
@@ -120,6 +120,9 @@ with final; {
 
   inherit (tracer.packages.${system}) tracer-game;
 
+  # HACK: referenced by hydra-module.nix but removed from nixos-unstable in 2022-09
+  utillinux = final.util-linux;
+
   # vector-0.23 + mqtt-sink
   vector = pkgs-unstable.callPackage ./vector {};