diff --git a/flake.lock b/flake.lock
index cb635b3..7ac1204 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1,5 +1,31 @@
 {
   "nodes": {
+    "asterisk-sounds-de": {
+      "inputs": {
+        "flake-utils": [
+          "flake-utils"
+        ],
+        "nix-filter": [
+          "nix-filter"
+        ],
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1748284610,
+        "narHash": "sha256-B3/OOZC0puXbODupPEbdMA6sJP39MzbMCl4j1HvgNfU=",
+        "ref": "refs/heads/main",
+        "rev": "6b1c484318727af78a64aee3f46903493dae8259",
+        "revCount": 1,
+        "type": "git",
+        "url": "https://git.jalr.de/jalr/asterisk-sounds-de"
+      },
+      "original": {
+        "type": "git",
+        "url": "https://git.jalr.de/jalr/asterisk-sounds-de"
+      }
+    },
     "crane": {
       "locked": {
         "lastModified": 1731098351,
@@ -278,6 +304,21 @@
         "type": "github"
       }
     },
+    "nix-filter": {
+      "locked": {
+        "lastModified": 1731533336,
+        "narHash": "sha256-oRam5PS1vcrr5UPgALW0eo1m/5/pls27Z/pabHNy2Ms=",
+        "owner": "numtide",
+        "repo": "nix-filter",
+        "rev": "f7653272fd234696ae94229839a99b73c9ab7de0",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "nix-filter",
+        "type": "github"
+      }
+    },
     "nix-github-actions": {
       "inputs": {
         "nixpkgs": [
@@ -477,6 +518,7 @@
     },
     "root": {
       "inputs": {
+        "asterisk-sounds-de": "asterisk-sounds-de",
         "disko": "disko",
         "flake-utils": "flake-utils",
         "gomod2nix": "gomod2nix",
@@ -484,6 +526,7 @@
         "impermanence": "impermanence",
         "krops": "krops",
         "lanzaboote": "lanzaboote",
+        "nix-filter": "nix-filter",
         "nix-pre-commit-hooks": "nix-pre-commit-hooks",
         "nixos-hardware": "nixos-hardware",
         "nixpkgs": "nixpkgs",
diff --git a/flake.nix b/flake.nix
index 606db08..3d0937c 100644
--- a/flake.nix
+++ b/flake.nix
@@ -5,6 +5,8 @@
 
     flake-utils.url = "github:numtide/flake-utils";
 
+    nix-filter.url = "github:numtide/nix-filter";
+
     gomod2nix = {
       url = "github:nix-community/gomod2nix";
       inputs.flake-utils.follows = "flake-utils";
@@ -52,6 +54,15 @@
       url = "github:Mic92/sops-nix";
       inputs.nixpkgs.follows = "nixpkgs";
     };
+
+    asterisk-sounds-de = {
+      url = "git+https://git.jalr.de/jalr/asterisk-sounds-de";
+      inputs = {
+        flake-utils.follows = "flake-utils";
+        nix-filter.follows = "nix-filter";
+        nixpkgs.follows = "nixpkgs";
+      };
+    };
   };
   outputs =
     { self
@@ -193,6 +204,7 @@
           ] ++ [
             { nixpkgs.overlays = [ nur.overlays.default ]; }
             home-manager.nixosModules.home-manager
+            inputs.asterisk-sounds-de.nixosModules.default
             inputs.disko.nixosModules.disko
             inputs.impermanence.nixosModules.impermanence
             inputs.lanzaboote.nixosModules.lanzaboote
diff --git a/pkgs/asterisk-sounds-de/default.nix b/pkgs/asterisk-sounds-de/default.nix
deleted file mode 100644
index ca5cad5..0000000
--- a/pkgs/asterisk-sounds-de/default.nix
+++ /dev/null
@@ -1,22 +0,0 @@
-{ stdenvNoCC
-, fetchurl
-, unzip
-}:
-
-stdenvNoCC.mkDerivation rec {
-  src = fetchurl {
-    url = "https://www.asterisksounds.org/sites/asterisksounds.org/files/sounds/de/download/asterisk-sounds-core-de-${version}.zip";
-    sha256 = "y97xVDBHgnD/Z/DxjKcSNjCXXfiVO+PWUFMbyQpaFLY=";
-  };
-  name = "asterisk-sounds-de";
-  version = "2.11.19";
-  dontBuild = true;
-  nativeBuildInputs = [ unzip ];
-  unpackPhase = ''
-    unzip $src
-  '';
-  installPhase = ''
-    mkdir $out
-    cp -r * $out
-  '';
-}
diff --git a/pkgs/asterisk-sounds-de/module.nix b/pkgs/asterisk-sounds-de/module.nix
deleted file mode 100644
index 0bfbeda..0000000
--- a/pkgs/asterisk-sounds-de/module.nix
+++ /dev/null
@@ -1,15 +0,0 @@
-{ config, lib, pkgs, ... }:
-
-let cfg = config;
-in
-{
-  config = lib.mkIf cfg.services.asterisk.enable {
-    systemd.services.asterisk.preStart = lib.mkMerge [
-      (lib.mkAfter ''
-        sounds_de="/var/lib/asterisk/sounds/de"
-        [ -L "$sounds_de" ] && rm "$sounds_de"
-        ln -s "${pkgs.asterisk-sounds-de}/" "$sounds_de"
-      '')
-    ];
-  };
-}
diff --git a/pkgs/default.nix b/pkgs/default.nix
index 5a27c44..7222cf4 100644
--- a/pkgs/default.nix
+++ b/pkgs/default.nix
@@ -6,7 +6,6 @@ let
   poetry2nix = callPackage inputs.poetry2nix { };
 in
 {
-  asterisk-sounds-de = callPackage ./asterisk-sounds-de { };
   ksoloti = callPackage ./ksoloti {
     gcc-arm-embedded = pkgsCross.arm-embedded.buildPackages.gcc;
   };
diff --git a/pkgs/modules.nix b/pkgs/modules.nix
index 067cbc4..195958b 100644
--- a/pkgs/modules.nix
+++ b/pkgs/modules.nix
@@ -1,6 +1,5 @@
 {
   imports = [
-    ./asterisk-sounds-de/module.nix
     ./ksoloti/module.nix
     ./myintercom-doorbell/module.nix
   ];