diff --git a/nixos/configuration.nix b/nixos/configuration.nix
index 470518c5..bfec60f3 100644
--- a/nixos/configuration.nix
+++ b/nixos/configuration.nix
@@ -86,6 +86,13 @@
     };
   };
 
+  nix.autoOptimiseStore = true;
+  nix.gc = {
+    automatic = true;
+    dates = "weekly";
+    options = "--delete-older-than 30d";
+  };
+
   nixpkgs.config.allowUnfree = true;
 
   # Enable the X11 windowing system.