diff --git a/nixos/common/nixpkgs.nix b/nixos/common/nixpkgs.nix
index 836fc51..170c5a8 100644
--- a/nixos/common/nixpkgs.nix
+++ b/nixos/common/nixpkgs.nix
@@ -11,6 +11,13 @@ in
         n: flake: {inherit flake;}
       );
   nix.settings = {
+    substituters = [
+      "https://cache.nixos.org/"
+      "https://hydra.redalder.org/"
+    ];
+    trusted-public-keys = [
+      "redalder-nix-cache-1:8t4zBJWgVtrfAOJ45iNHEqA/dDFV47Sr1sGa8ME9ru0="
+    ];
     experimental-features = [ "flakes" "nix-command" ];
   };
   nixpkgs.config.allowUnfree = true;