diff --git a/hosts/hitsugibune/matrix.nix b/hosts/hitsugibune/matrix.nix
index 2644556..ce70439 100644
--- a/hosts/hitsugibune/matrix.nix
+++ b/hosts/hitsugibune/matrix.nix
@@ -15,6 +15,10 @@
     return 200 '${builtins.toJSON data}';
   '';
   turn = config.services.coturn;
+  unstablePkgs = import inputs.nixpkgs {
+    inherit (pkgs) system;
+    config = { permittedInsecurePackages = [ "olm-3.2.16" ]; };
+  };
 in {
   age.secrets.matrix = {
     file = ../../secrets/matrix.age;
@@ -209,7 +213,7 @@ in {
   };
 
   # WARN: Remove once mautrix-whatsapp is updated
-  nixpkgs.config.permittedInsecurePackages = [
+  inputs.nixpkgs.config.permittedInsecurePackages = [
     "olm-3.2.16"
   ];
 
@@ -284,7 +288,7 @@ in {
   services.mautrix-whatsapp = {
     enable = true;
     environmentFile = config.age.secrets.mautrix-whatsapp.path;
-    package = inputs.nixpkgs.legacyPackages.${pkgs.system}.mautrix-whatsapp;
+    package = unstablePkgs.mautrix-whatsapp;
     settings = {
       homeserver = {
         address = "http://localhost:8008";