diff --git a/modules/nix-config.nix b/modules/nix-config.nix
index 13ffe16..80b1825 100644
--- a/modules/nix-config.nix
+++ b/modules/nix-config.nix
@@ -25,6 +25,13 @@
       # avoid unwanted garbage collection when using direnv
       keep-outputs = true;
       keep-derivations = true;
+
+      trusted-substituters = [ "https://devenv.cachix.org" ];
+      trusted-public-keys = [ "devenv.cachix.org-1:w1cLUi8dv3hnoSPGAuibQv+f9TZLr6cv/Hm9XgU50cw=" ];
+      trusted-users = [
+        "root"
+        "alex"
+      ];
     };
   };
 }