diff --git a/hosts/chonk/builder.nix b/hosts/chonk/builder.nix
index e7c6918d..f7013d1d 100644
--- a/hosts/chonk/builder.nix
+++ b/hosts/chonk/builder.nix
@@ -2,6 +2,7 @@
   self,
   config,
   pkgs,
+  lib,
   ...
 }: let
   psCfg = config.pub-solar;
@@ -12,7 +13,10 @@ in {
     file = "${self}/secrets/chonk_nix_builder_private_key.age";
   };
 
-  nix.settings.trusted-users = ["builder"];
+  nix = {
+    gc.automatic = lib.mkForce false;
+    settings.trusted-users = ["builder"];
+  };
 
   boot.binfmt.emulatedSystems = ["aarch64-linux"];