diff --git a/modules/cli/nix.nix b/modules/cli/nix.nix
index e46f771..0769b1c 100644
--- a/modules/cli/nix.nix
+++ b/modules/cli/nix.nix
@@ -2,4 +2,9 @@
 
 {
   nix.package = pkgs.nixFlakes;
+  nix.gc = {
+    automatic = true;
+    options = "--max-freed $((32 * 1024**3)) --delete-older-than 14d";
+  };
+  nix.optimise.automatic = true;
 }