diff --git a/common/global/nix.nix b/common/global/nix.nix
index 16be1cc..ac5625d 100644
--- a/common/global/nix.nix
+++ b/common/global/nix.nix
@@ -11,6 +11,21 @@ in {
         "root"
         "@wheel"
       ];
+      trusted-substituters = [
+        "https://cache.nixos.org"
+        "https://cache.tmmworkshop.com"
+        "https://nix-community.cachix.org"
+      ];
+      substituters = [
+        "https://cache.nixos.org"
+        "https://cache.tmmworkshop.com"
+        "https://nix-community.cachix.org"
+      ];
+      trusted-public-keys = [
+        "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY="
+        "cache.tmmworkshop.com:jHffkpgbmEdstQPoihJPYW9TQe6jnQbWR2LqkNGV3iA="
+        "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
+      ];
       auto-optimise-store = lib.mkDefault true;
       experimental-features = [
         "nix-command"