base: split maintenance config into own module

base/base.nix

@@ -29,6 +29,7 @@ in
   imports = [
     ./borg-config.nix
     ./grafana-alloy.nix
+    ./maintenance.nix
     ./network.nix
     ./qemu.nix
     ./secrets.nix
@@ -55,13 +56,6 @@ in
       PAGER = "nvimpager";
     };
 
-    # Maintenance
-    nix.gc = {
-      automatic = true;
-      dates = "weekly";
-      options = "--delete-older-than 14d";
-    };
-
     nix.settings = {
       auto-optimise-store = true;
       cores = 2;

base/maintenance.nix

@@ -0,0 +1,20 @@
+# Module: base/maintenance
+# Configure nix-store optimization, log rotations, etc
+{
+  config,
+  lib,
+  pkgs,
+  pkgsUnstable,
+  inputs,
+  ...
+}:
+
+with lib;
+
+{
+  nix.gc = {
+    automatic = true;
+    dates = "weekly";
+    options = "--delete-older-than 14d";
+  };
+}