diff --git a/flake.nix b/flake.nix
index 8c647a7..e81a05a 100644
--- a/flake.nix
+++ b/flake.nix
@@ -14,6 +14,11 @@
     treefmt-nix.inputs.nixpkgs.follows = "nixpkgs";
   };
 
+  nixConfig = {
+    trusted-substituters = "https://cache.garnix.io";
+    extra-trusted-public-keys = "cache.garnix.io:CTFPyKSLcx5RMJKfLo5EEPUObbA78b0YQ2DTCJXqr9g=";
+  };
+
   outputs = inputs @ {flake-parts, ...}:
     flake-parts.lib.mkFlake {inherit inputs;} {
       imports = [
diff --git a/server-config/configuration.nix b/server-config/configuration.nix
index 54ab20f..c3c1f1b 100644
--- a/server-config/configuration.nix
+++ b/server-config/configuration.nix
@@ -53,6 +53,8 @@
       # https://github.com/nix-community/nix-direnv#home-manager
       keep-outputs = true
       keep-derivations = true
+
+      accept-flake-config = true
     '';
 
     # Automate garbage collection