diff --git a/defaults/base/default.nix b/defaults/base/default.nix
index d2b0a49..813c951 100644
--- a/defaults/base/default.nix
+++ b/defaults/base/default.nix
@@ -53,6 +53,7 @@ in {
   # Package management
   nix = {
     settings.trusted-users = [ "root" "@wheel" ];
+    optimise.automatic = true;
     gc = {
       automatic = true;
       dates = "weekly";