galanthus: Add nh

hosts/galanthus/configuration.nix

@@ -1,4 +1,9 @@
-{ inputs, pkgs, ... }:
+{
+  inputs,
+  pkgs,
+  config,
+  ...
+}:
 {
   imports = [
     inputs.agenix.nixosModules.default
@@ -52,6 +57,15 @@
       enable = true;
       enableSSHSupport = true;
     };
+
+    nh = {
+      enable = true;
+      # clean = { ## nix.gc already handles this
+      #   enable = true;
+      #   extraArgs = "--keep-since 4d --keep 3";
+      # };
+      flake = "${config.users.users.jan.home}/.config/nix";
+    };
   };
 
   environment.systemPackages = [