diff --git a/flake.nix b/flake.nix
index 9ea5150..5c693bb 100644
--- a/flake.nix
+++ b/flake.nix
@@ -146,11 +146,11 @@
         ./nixos/configs/dmesg.nix
         ./nixos/configs/printing.nix
         ./nixos/configs/virt-host.nix
+        ./nixos/configs/wireshark.nix
         ./nixos/configs/mount-rsync-kate.nix
         ./nixos/configs/mount-fastmail-tmllc.nix
 
         ./nixos/overlays/fixup-canon.nix
-
         #
       ];
 
diff --git a/nixos/configs/wireshark.nix b/nixos/configs/wireshark.nix
new file mode 100644
index 0000000..5b42261
--- /dev/null
+++ b/nixos/configs/wireshark.nix
@@ -0,0 +1,12 @@
+#
+# Sets up wireshark.
+#
+{ ... }: {
+  programs.wireshark = {
+    enable = true;
+    usbmon.enable = true;
+    dumpcap.enable = true;
+  };
+
+  users.users.deprekated.extraGroups = [ "wireshark" ];
+}
diff --git a/nixos/packages/offline.pkgs.nix b/nixos/packages/offline.pkgs.nix
index a4d9ab6..1ed554b 100644
--- a/nixos/packages/offline.pkgs.nix
+++ b/nixos/packages/offline.pkgs.nix
@@ -18,6 +18,7 @@ with pkgs;
 
   # Development.
   act
+  arduino-cli
   go
   rustc
   bundix
diff --git a/zellij/config.kdl b/zellij/config.kdl
index af054af..21c1bbd 100644
--- a/zellij/config.kdl
+++ b/zellij/config.kdl
@@ -266,8 +266,7 @@ theme "solarized-dark"
 // Require a leader key before we run any commands.
 default_mode "locked"
 
-// Uncomment this when we're used enough to the keybinds. :)
-// default_layout "compact"
+default_layout "compact"
 
 // The folder in which Zellij will look for layouts
 // (Requires restart)