diff --git a/modules/nixos/lxc.nix b/modules/nixos/lxc.nix
index 0c72439..8af8b67 100644
--- a/modules/nixos/lxc.nix
+++ b/modules/nixos/lxc.nix
@@ -12,6 +12,12 @@
 
     security.sudo-rs.enable = true;
     programs.nix-ld.enable = true;
+    nix.optimise.automatic = true;
+    nix.gc = {
+      automatic = true;
+      dates = "weekly";
+      options = "--delete-older-than 30d";
+    };
   };
 
   # Generic bootstrapping lxc, use a specific host file for more