diff --git a/hosts/alice/system.nix b/hosts/alice/system.nix
index 1c72f9b..2b4993a 100644
--- a/hosts/alice/system.nix
+++ b/hosts/alice/system.nix
@@ -38,6 +38,17 @@
     settings = {
       auto-optimise-store = true;
       trusted-users = ["root"];
+
+      substituters = [
+        "https://cache.nixos.org/"
+        "https://kitchen.cachix.org"
+        "https://nix-community.cachix.org"
+      ];
+
+      trusted-public-keys = [
+        "kitchen.cachix.org-1:6Re4jyiv2oURRRehWaktZ9eEcZpKd8g3v10R8jWsaD4="
+        "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
+      ];
     };
 
     gc = {