diff --git a/flake.nix b/flake.nix
index e6793f2..8a59bf7 100644
--- a/flake.nix
+++ b/flake.nix
@@ -41,7 +41,11 @@
           pkg-config
         ];
 
-        audioFile = "https://files.rhemawavetech.com/audio.wav";
+        audioFile = pkgs.fetchurl {
+          url = "https://files.rhemawavetech.com/audio.wav";
+          sha256 = "sha256-5Dikxx9RKOoPfY1ukIgMoVQ7tzpMirp+XPj6OphfEW0=";
+        };
+
       in
       {
         packages.default = pkgs.buildGoModule {