diff --git a/configuration.nix b/configuration.nix
index 07e55a5..70ebd21 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -96,6 +96,13 @@
   nix = {
     package = pkgs.nixFlakes;
     extraOptions = "experimental-features = nix-command flakes";
+
+    autoOptimiseStore = true;
+    gc = {
+      automatic = true;
+      dates = "weekly";
+      options = "--delete-older-than 30d";
+    };
   };
 
   system.stateVersion = "22.05";