diff --git a/machines/hippocampus/configuration.nix b/machines/hippocampus/configuration.nix
index b321eb6..59a4152 100644
--- a/machines/hippocampus/configuration.nix
+++ b/machines/hippocampus/configuration.nix
@@ -46,6 +46,9 @@
     options = "--delete-older-than 30d";
   };
   nix.settings.auto-optimise-store = true;
+  nix.settings.trusted-users = [
+    "server"
+  ];
   
   # Bootloader.
   boot.loader.systemd-boot.enable = true;