diff --git a/modules/system.nix b/modules/system.nix
index 92c7d37..ecb9913 100644
--- a/modules/system.nix
+++ b/modules/system.nix
@@ -11,6 +11,10 @@
     trusted-public-keys = [
       "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
     ];
+    trusted-users = [
+      "root"
+      "panotaka"
+    ];
   };
 
   # Enable CUPS to print documents.