diff --git a/modules/clan/phonebox/default.nix b/modules/clan/phonebox/default.nix
index 5b8c97a..d5cdaa2 100644
--- a/modules/clan/phonebox/default.nix
+++ b/modules/clan/phonebox/default.nix
@@ -27,6 +27,7 @@
             lib,
             config,
             pkgs,
+            self,
             ...
           }:
           let
diff --git a/overlays/default.nix b/overlays/default.nix
index 583c8e9..6cdc1b2 100644
--- a/overlays/default.nix
+++ b/overlays/default.nix
@@ -2,5 +2,11 @@
 {
   flake.overlays = {
     packagesOverlay = import ../pkgs/overlay.nix;
+    asteriskOverlay = final: prev: {
+
+  asterisk = prev.asterisk.overrideAttrs (old: {
+    propagatedNativeBuildInputs = [ prev.pkgs.spandsp3 ];
+  });
+}
   };
 }
diff --git a/pkgs/overlay.nix b/pkgs/overlay.nix
index a71c6f7..d327dd3 100644
--- a/pkgs/overlay.nix
+++ b/pkgs/overlay.nix
@@ -1,8 +1,4 @@
 final: prev: {
   think-gtcm = final.callPackage ./think-gtcm.nix { };
   think-backend-gtcm = final.callPackage ./think-backend-gtcm.nix { php = final.php83; };
-
-  asterisk = prev.asterisk.overrideAttrs (old: {
-    propagatedNativeBuildInputs = [ prev.pkgs.spandsp3 ];
-  });
 }