diff --git a/aprs.nix b/aprs.nix
index 725efcf..2ee74ac 100644
--- a/aprs.nix
+++ b/aprs.nix
@@ -1,13 +1,12 @@
 { config, lib, pkgs, ... }: 
 let
   direwolfConfig = pkgs.writeText "direwolf-config" ''
-    ADEVICE  plughw:1,0
+    ADEVICE  plughw:Device,0
     ACHANNELS 1
     CHANNEL 0
     MYCALL G5BSD-1
     MODEM 1200
     PTT CM108 3
-    DCD GPIO 24
     AGWPORT 8000
     KISSPORT 8001
     PBEACON delay=1  every=30 overlay=S symbol="digi" lat=51^13.07N long=000^8.69W power=2 height=12 gain=4 comment="Redhill Aerodrome." via=WIDE1-1,WIDE2-1
diff --git a/configuration.nix b/configuration.nix
index 275b060..648fc1e 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -3,7 +3,7 @@
   imports = [
     ./aprs.nix
   ];
-  environment.systemPackages = with pkgs; [ vim git direwolf ];
+  environment.systemPackages = with pkgs; [ alsa-utils vim git direwolf ];
   security.sudo.extraRules= [
     {  users = [ "jim" ];
       commands = [