diff --git a/pkgs/tools/video/untrunc-anthwlock/default.nix b/pkgs/tools/video/untrunc-anthwlock/default.nix
index 6ca3a23c281c..6ec52db7ebfd 100644
--- a/pkgs/tools/video/untrunc-anthwlock/default.nix
+++ b/pkgs/tools/video/untrunc-anthwlock/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, ffmpeg_4, libui, wrapGAppsHook }:
+{ lib, stdenv, fetchFromGitHub, ffmpeg_4, libui, unstableGitUpdater, wrapGAppsHook }:
 
 stdenv.mkDerivation {
   pname = "untrunc-anthwlock";
@@ -30,6 +30,8 @@ stdenv.mkDerivation {
 
   enableParallelBuilding = true;
 
+  passthru.updateScript = unstableGitUpdater { };
+
   meta = with lib; {
     description = "Restore a truncated mp4/mov (improved version of ponchio/untrunc)";
     homepage = "https://github.com/anthwlock/untrunc";