Better folder structure

hm_modules/nix-index.nix

@@ -0,0 +1,27 @@
+{ pkgs, ... }:
+{
+  programs.nix-index = {
+    enable = true;
+    enableBashIntegration = true;
+    enableZshIntegration = true;
+  };
+
+  systemd.user = {
+    services."nix-index" = {
+      Unit = {
+        Description = "Update the nix-locate database";
+        After = [ "network.target" ];
+      };
+      Service = {
+        Type = "oneshot";
+        ExecStart = "${pkgs.nix-index}/bin/nix-index";
+      };
+    };
+
+    timers."nix-index" = {
+      Unit.Description = "Daily update the nix-locate database";
+      Timer = { OnCalendar = "daily"; Persistent = true; Unit = "nix-index.service"; };
+      Install.WantedBy = [ "timers.target" ];
+    };
+  };
+}