diff --git a/modules/core.nix b/modules/core.nix
index d1827ca..421bb87 100644
--- a/modules/core.nix
+++ b/modules/core.nix
@@ -2,8 +2,12 @@
   config = {
     system.stateVersion = "24.05";
     time.timeZone = "America/New_York";
-    nix.settings.experimental-features = ["flakes" "nix-command"];
-    nix.settings.trusted-users = ["@wheel"];
+    nix.settings = {
+      experimental-features = ["flakes" "nix-command"];
+      trusted-users = ["@wheel"];
+      substituters = [" https://cache.wanderingcrow.net/main"];
+      trusted-public-keys = ["main:w2Ryiog6zSARbqXfTTYZmhg+FrEodWjCgyy9tYLZIAw="];
+    };
 
     environment.variables = {
       EDITOR = "nvim";