diff --git a/flake.nix b/flake.nix
index b3b1e51..25bd15f 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,6 +1,17 @@
 {
   description = "My system configuration";
 
+  nixConfig = {
+    extra-substituters = [
+      "https://cache.garnix.io"
+      "https://hyprland.cachix.org"
+    ];
+    extra-trusted-public-keys = [
+      "cache.garnix.io:CTFPyKSLcx5RMJKfLo5EEPUObbA78b0YQ2DTCJXqr9g="
+      "hyprland.cachix.org-1:a7pgxzMz7+chwVL3/pzj6jIBMioiJM7ypFP8PwtkuGc="
+    ];
+  };
+
   inputs = {
 
     nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
diff --git a/nixos/modules/users/chest.nix b/nixos/modules/users/chest.nix
index 6c353da..8603327 100644
--- a/nixos/modules/users/chest.nix
+++ b/nixos/modules/users/chest.nix
@@ -29,4 +29,6 @@
       };
     };
   };
+
+  nix.settings.trusted-users = [ "chest" ];
 }
diff --git a/nixos/modules/users/sweetbread.nix b/nixos/modules/users/sweetbread.nix
index 2710069..bf9e87e 100644
--- a/nixos/modules/users/sweetbread.nix
+++ b/nixos/modules/users/sweetbread.nix
@@ -29,4 +29,6 @@
       };
     };
   };
+
+  nix.settings.trusted-users = [ "sweetbread" ];
 }