diff --git a/ops/machines/build01/default.nix b/ops/machines/build01/default.nix
index 74a929b43..7c01840a4 100644
--- a/ops/machines/build01/default.nix
+++ b/ops/machines/build01/default.nix
@@ -37,6 +37,7 @@ in
   system.switch.enableNg = false;
   nix.nrBuildUsers = 256;
   nix.settings.max-jobs = 64;
+  nix.package = pkgs.lix;
   # Put builds in /var/tmp as it can be quite big and would cause spurious
   # failures from time to time: https://git.snix.dev/snix/snix/issues/82
   nix.settings.build-dir = "/var/tmp";