diff --git a/config/hosts/nixos76/default.nix b/config/hosts/nixos76/default.nix
index 77f0586..2cfbb92 100644
--- a/config/hosts/nixos76/default.nix
+++ b/config/hosts/nixos76/default.nix
@@ -9,6 +9,13 @@
       ../../modules/system76-pc.nix
     ];
 
+  nix.settings.auto-optimise-store = true;
+  nix.gc = {
+    automatic = true;
+    dates = "weekly";
+    options = "--delete-older-than 5d";
+  };
+
   networking.hostName = "nixos76"; # Define your hostname.
 
   boot.initrd.availableKernelModules = [ "xhci_pci" "ahci" "usb_storage" "usbhid" "sd_mod" "rtsx_pci_sdmmc" ];