diff --git a/configs/default.nix b/configs/default.nix
index eae4a91..da2995e 100644
--- a/configs/default.nix
+++ b/configs/default.nix
@@ -89,6 +89,8 @@ in {
         extraGroups = ["pipewire" "audio"];
       };
 
+      nix.settings.trusted-users = [ config.users.users.me.name ];
+
       age.secrets = {
         kfm-password.file = ../secrets/kfm-password.age;
       };
diff --git a/flake.nix b/flake.nix
index f6d123e..e5032e3 100644
--- a/flake.nix
+++ b/flake.nix
@@ -54,6 +54,11 @@
     wallpapers.flake = false;
   };
 
+  nixConfig = {
+    extra-substituters = [ "https://kmein.cachix.org" ];
+    extra-trusted-public-keys = [ "kmein.cachix.org-1:rsJ2b6++VQHJ1W6rGuDUYsK/qUkFA3bNpO6PyEyJ9Ls=" ];
+  };
+
   outputs = inputs @ {
     self,
     nixpkgs,