diff --git a/nix/gitlab-ci/default.nix b/nix/gitlab-ci/default.nix
index 2717d0f549..772c192e9b 100644
--- a/nix/gitlab-ci/default.nix
+++ b/nix/gitlab-ci/default.nix
@@ -22,6 +22,17 @@ let
       };
       tags = [ "cacher" ];
     };
+
+    nixCacheMacOS = {
+      stage = "build";
+      image = "nixos/nix:latest";
+      script = [
+        "nix run -f ./ third_party.nixpkgs.bash -c ./hack/populate_secrets.sh"
+        "nix build -v -f ./ci-root.nix --substituters \"https://cache.nixos.org/ s3://lukegb-nix-cache?endpoint=storage.googleapis.com&trusted=1\""
+        "nix copy -v --to 's3://lukegb-nix-cache?endpoint=storage.googleapis.com' ./result"
+      ];
+      tags = [ "macos" ];
+    };
   } // (lib.mapAttrs deployStage deployMachs);
 
   deployMachs = lib.filterAttrs (name: cfg: cfg.config.my.deploy.enable) depot.ops.nixos.systemConfigs;