diff --git a/modules/nix.nix b/modules/nix.nix
index f07e6ac..9fdbbcb 100644
--- a/modules/nix.nix
+++ b/modules/nix.nix
@@ -1,5 +1,11 @@
 { lib, pkgs, inputs, config, ... }:
-{
+let
+  gcConfig = {
+    automatic = true;
+    dates = "weekly";
+    options = "--delete-older-than 14d";
+  };
+in {
   environment.variables = {
     NIXPKGS_ALLOW_UNFREE = "1";
   };
@@ -37,12 +43,9 @@
     };
   };
 
-  nix.optimise.automatic = true;
-  nix.gc = {
-    automatic = true;
-    dates = "weekly";
-    options = "--delete-older-than 14d";
-  };
+  nix.optimise.automatic = true; # likely not needed w/ auto-optimise-store, comfy to keep though
+  nix.gc = gcConfig;
+  hm.nix.gc = gcConfig;
 
   programs.command-not-found.enable = false;
   programs.nix-index.enable = true;