diff --git a/ops/nixos/lib/common.nix b/ops/nixos/lib/common.nix
index 9369172ecb..ae02d99e67 100644
--- a/ops/nixos/lib/common.nix
+++ b/ops/nixos/lib/common.nix
@@ -12,8 +12,12 @@ in
   nix = {
     nixPath = [ "depot=/home/lukegb/depot/" "nixpkgs=/home/lukegb/depot/third_party/nixpkgs/" ];
     trustedUsers = [ "root" "@wheel" ];
-    binaryCaches = lib.mkForce [ "https://cache.nixos.org/" ];
+    binaryCaches = lib.mkForce [ "https://cache.nixos.org/" "s3://lukegb-nix-cache?endpoint=storage.googleapis.com&trusted=1" ];
     trustedBinaryCaches = lib.mkForce [ "https://cache.nixos.org/" "s3://lukegb-nix-cache?endpoint=storage.googleapis.com&trusted=1" ];
+    envVars = {
+      AWS_ACCESS_KEY_ID = "${depot.ops.secrets.nixCache.AWS_ACCESS_KEY_ID}";
+      AWS_SECRET_ACCESS_KEY = "${depot.ops.secrets.nixCache.AWS_SECRET_ACCESS_KEY}";
+    };
   };
   nixpkgs.config = depot.third_party.nixpkgsConfig;