rtorrent downloads, but doesn't upload yet

nix/home/programs/rtorrent/default.nix

@@ -1,16 +1,34 @@
 { pkgs, finalDir, downloadDir, watchDir }:
+let
+  dhtPort = 40000;
+in
 {
 
+  environment.systemPackages = with pkgs; [ rtorrent ];
+
+  users.extraUsers.rtorrent.extraGroups = [ "users" ];
+
   services.rtorrent = {
     enable = true;
     downloadDir = downloadDir;
-    group = "users";
+    # flood needs to be able to access the datadir
+    dataDir = downloadDir;
     configText =
       builtins.readFile (pkgs.substituteAll {
         src = ./rtorrent.rc;
         watchDir = watchDir;
         finalDir = finalDir;
+        dhtPort = builtins.toString dhtPort;
       });
   };
 
+  networking.firewall = {
+    allowedTCPPorts = [
+      # rtorrent default
+      50000
+    ];
+    allowedUDPPorts = [
+      dhtPort
+    ];
+  };
 }