diff --git a/MMDVMHost/module.nix b/MMDVMHost/module.nix
index 9bde484..3190dbd 100644
--- a/MMDVMHost/module.nix
+++ b/MMDVMHost/module.nix
@@ -1,4 +1,4 @@
-{ lib, config, pkgs, mmdvm_host, mmdvm_firmware, ... }:
+{ lib, config, pkgs, mmdvm_host, ... }:
 with lib;
 let
   # Shorter name to access final settings a 
@@ -10,36 +10,14 @@ in
 
   options.services.mmdvm_host = {
     enable = mkEnableOption "MMDVMHost service";
-    
-    host_package = mkOption {
+    package = mkOption {
       default = mmdvm_host.x86_64-linux.default;
       type = types.package;
     };
-
-    firmware_package = mkOption {
-      default = mmdvm_firmware.x86_64-linux.default;
-      type = types.package;
-    };
-    
     user = mkOption {
       type = types.str;
       default = "afg";
     };
-
-    group = mkOption {
-      type = types.str;
-      default = "afg";
-    };
-
-    config-file = mkOption {
-      type = types.str;
-    };
-
-    usb-tty = mkOption {
-      type = types.str;
-      default = "/dev/ttyUSB0";
-    };
-
   };
 
 
@@ -47,8 +25,7 @@ in
     # List packages installed in system profile. To search, run:
     # $ nix search wget
     environment.systemPackages = [
-      pkgs.stm32flash
-      cfg.host_package
+      cfg.package
     ];
 
     systemd.services.mmdvm_host = {
@@ -59,22 +36,13 @@ in
       serviceConfig = {
         Type = "exec";
         User = cfg.user;
-        Group = cfg.group;
         Restart = "always";
         RestartSec = "3s";
+        StartLimitIntervalSec = "0";
         RuntimeDirectory = "MMDVMHost";
       };
       script = ''
-        if [ ! -e /var/lib/mmdvm/firmware-version ]; then
-          mkdir -p /var/lib/mmdvm
-          touch /var/lib/mmdvm/firmware-version
-        fi
-        if [ "${cfg.firmware_package}" != "$(cat /var/lib/mmdvm/firmware-version)" ]; then
-          ${pkgs.stm32flash}/bin/stm32flash -w ${cfg.firmware_package}/firmware/mmdvm_f4.bin -i ',-dtr,-rts,dtr,,:-dtr,rts,dtr' ${cfg.usb-tty}
-          echo "{cfg.firmware_package}" > /var/lib/mmdvm/firmware-version
-        fi
-        
-        exec ${cfg.package}/bin/MMDVMHost ${cfg.config-file}
+        exec ${cfg.package}/bin/MMDVMHost
       '';
     };
   };
diff --git a/flake.lock b/flake.lock
index d22a24f..98f71cb 100644
--- a/flake.lock
+++ b/flake.lock
@@ -2,16 +2,16 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1734323986,
-        "narHash": "sha256-m/lh6hYMIWDYHCAsn81CDAiXoT3gmxXI9J987W5tZrE=",
+        "lastModified": 1717179513,
+        "narHash": "sha256-vboIEwIQojofItm2xGCdZCzW96U85l9nDW3ifMuAIdM=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "394571358ce82dff7411395829aa6a3aad45b907",
+        "rev": "63dacb46bf939521bdc93981b4cbb7ecb58427a0",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "nixos-24.11",
+        "ref": "24.05",
         "repo": "nixpkgs",
         "type": "github"
       }
diff --git a/flake.nix b/flake.nix
index 4736ab0..dc7ec58 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,7 +1,7 @@
 {
   description = "A flake for MMDVMHost for DB0KL.";
   inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.11";
+    nixpkgs.url = "github:NixOS/nixpkgs/24.05";
   };
 
 
@@ -21,10 +21,7 @@
 
       nixosModules.MMDVMHost = { config, pkgs, ... }: {
         imports = [ ./MMDVMHost/module.nix ];
-        _module.args = {
-          mmdvm_host = self.packages.x86_64-linux.MMDVMHost;
-          mmdvm_firmware = self.packages.x86_64-linux.MMDVMFirmware;
-        };
+        _module.args.mmdvm_host = self.packages.x86_64-linux.MMDVMHost;
       };
     };
 }