diff --git a/nixos/machines/chungus/media-audiobookshelf.nix b/nixos/machines/chungus/media-audiobookshelf.nix
index 4d3303a..5b48a57 100644
--- a/nixos/machines/chungus/media-audiobookshelf.nix
+++ b/nixos/machines/chungus/media-audiobookshelf.nix
@@ -1,13 +1,17 @@
 { config, lib, pkgs, ... }:
 with pkgs;
+let
+  port = 8000;
+  group = "media";
+in
 {
-  users = {
-    users.audiobookshelf.isSystemUser = true;
-    users.audiobookshelf.group = "media";
+  users.users.audiobookshelf = {
+    isSystemUser = true;
+    group = group;
   };
 
-  networking.firewall.allowedTCPPorts = [ 8000 ];
-  networking.firewall.allowedUDPPorts = [ 8000 ];
+  networking.firewall.allowedTCPPorts = [ port ];
+  networking.firewall.allowedUDPPorts = [ port ];
 
   systemd.services.audiobookshelf = {
     enable = true;
@@ -15,7 +19,7 @@ with pkgs;
     serviceConfig = {
       Type = "simple";
       WorkingDirectory = "/srv/audiobookshelf";
-      ExecStart = "${unstable.audiobookshelf}/bin/audiobookshelf --port 8000";
+      ExecStart = "${unstable.audiobookshelf}/bin/audiobookshelf --port ${toString port}";
       ExecReload = "${util-linux}/bin/kill -HUP $MAINPID";
       Restart = "always";
       User = config.users.users.audiobookshelf.name;
@@ -24,4 +28,5 @@ with pkgs;
     wantedBy = [ "multi-user.target" ];
     requires = [ "network.target" ];
   };
+
 }