diff --git a/pkgs/by-name/kr/kryptor/package.nix b/pkgs/by-name/kr/kryptor/package.nix
index bcfeffc3a0d8..f1b548ca0fb4 100644
--- a/pkgs/by-name/kr/kryptor/package.nix
+++ b/pkgs/by-name/kr/kryptor/package.nix
@@ -4,6 +4,7 @@
   fetchFromGitHub,
   dotnetCorePackages,
   versionCheckHook,
+  nix-update-script,
 }:
 
 buildDotnetModule rec {
@@ -27,7 +28,7 @@ buildDotnetModule rec {
   nativeInstallCheckInputs = [ versionCheckHook ];
 
   passthru = {
-    updateScript = ./update.sh;
+    updateScript = nix-update-script { };
   };
 
   meta = {
diff --git a/pkgs/by-name/kr/kryptor/update.sh b/pkgs/by-name/kr/kryptor/update.sh
deleted file mode 100755
index 1e6e7d7646de..000000000000
--- a/pkgs/by-name/kr/kryptor/update.sh
+++ /dev/null
@@ -1,6 +0,0 @@
-#!/usr/bin/env nix-shell
-#!nix-shell --pure -i bash -p bash nix nix-update git cacert
-set -euo pipefail
-
-nix-update kryptor
-$(nix-build . -A kryptor.fetch-deps --no-out-link)