tone: use nix-update-script

pkgs/by-name/to/tone/package.nix

@@ -5,6 +5,7 @@
   ffmpeg-full,
   dotnetCorePackages,
   versionCheckHook,
+  nix-update-script,
 }:
 
 buildDotnetModule rec {
@@ -33,7 +34,7 @@ buildDotnetModule rec {
   doInstallCheck = true;
   nativeInstallCheckInputs = [ versionCheckHook ];
 
-  passthru.updateScript = ./update.sh;
+  passthru.updateScript = nix-update-script { };
 
   meta = {
     homepage = "https://github.com/sandreas/tone";

pkgs/by-name/to/tone/update.sh

@@ -1,8 +0,0 @@
-#!/usr/bin/env nix-shell
-#!nix-shell --pure -i bash -p bash nix nix-update git cacert
-set -eo pipefail
-
-prev_version=$(nix eval --raw -f. tone.version)
-nix-update tone
-[[ $(nix eval --raw -f. tone.version) == "$prev_version" ]] ||
-  "$(nix-build . -A tone.fetch-deps --no-out-link)"