diff --git a/pkgs/by-name/wa/wast-refmt/package.nix b/pkgs/by-name/wa/wast-refmt/package.nix
index c0805e922448..c72b6d8909db 100644
--- a/pkgs/by-name/wa/wast-refmt/package.nix
+++ b/pkgs/by-name/wa/wast-refmt/package.nix
@@ -8,6 +8,7 @@
   nodejs,
   makeBinaryWrapper,
   gcc,
+  nix-update-script,
 }:
 stdenv.mkDerivation (finalAttrs: {
   pname = "wast-refmt";
@@ -59,6 +60,8 @@ stdenv.mkDerivation (finalAttrs: {
     runHook postInstall
   '';
 
+  passthru.updateScript = nix-update-script { };
+
   meta = {
     description = "WAST Reformatter";
     homepage = "https://webassembly.js.org";