diff --git a/hosts/catbook-j/configuration.nix b/hosts/catbook-j/configuration.nix
index c258f4d..69a6e68 100644
--- a/hosts/catbook-j/configuration.nix
+++ b/hosts/catbook-j/configuration.nix
@@ -55,7 +55,13 @@
 
   services.xserver.libinput.touchpad.tapping = false;
 
-  environment.systemPackages = [pkgs.plantuml pkgs.mqttui pkgs.mobile-broadband-provider-info pkgs.modem-manager-gui pkgs.wireshark];
+  environment.systemPackages = [
+    pkgs.plantuml
+    pkgs.mqttui
+    pkgs.mobile-broadband-provider-info
+    pkgs.modem-manager-gui
+    pkgs.wireshark
+  ];
 
   # Bootloader.
   boot.loader.systemd-boot.enable = true;