diff --git a/modules/gc.nix b/modules/gc.nix
index 957aeed..0d564dc 100644
--- a/modules/gc.nix
+++ b/modules/gc.nix
@@ -4,10 +4,13 @@
     enable = true;
     flake = inputs.self.outPath;
     flags = [
+      "--update-input" "nixpkgs"
+      "--no-write-lock-file"
       "--print-build-logs"
     ];
     dates = "02:00";
     randomizedDelaySec = "45min";
+    persistent = true;
   };
 
   nix.gc = {