Running nixpkgs-update (https://nix-community.org/update-bot/) with UPDATE_INFO: alsa-utils 0 -> 1
attrpath: alsa-utils
Checking auto update branch...
[version] 
[version] skipping because derivation has updateScript
[rustCrateVersion] 
[rustCrateVersion] No cargoHash found
[golangModuleVersion] 
[golangModuleVersion] Not a buildGoModule package with vendorHash
[npmDepsVersion] 
[npmDepsVersion] No npmDepsHash
[updateScript] 
[updateScript] Success
[updateScript] this derivation will be built:
  /nix/store/x4nyyigq78zlz6d0pclx9s8qx6d58lwm-packages.json.drv
building '/nix/store/x4nyyigq78zlz6d0pclx9s8qx6d58lwm-packages.json.drv'...

Going to be running update for following packages:
 - alsa-utils-1.2.15.2

Press Enter key to continue...
Running update for:
Enqueuing group of 1 packages
 - alsa-utils-1.2.15.2: UPDATING ...
 - alsa-utils-1.2.15.2: DONE.

Packages updated!

Diff after rewrites:
diff --git a/pkgs/by-name/al/alsa-utils/package.nix b/pkgs/by-name/al/alsa-utils/package.nix
index ff627a73cc83..e293ed8d10e7 100644
--- a/pkgs/by-name/al/alsa-utils/package.nix
+++ b/pkgs/by-name/al/alsa-utils/package.nix
@@ -32,11 +32,11 @@ let
 in
 stdenv.mkDerivation (finalAttrs: {
   pname = "alsa-utils";
-  version = "1.2.15.2";
+  version = "1.2.16";
 
   src = fetchurl {
     url = "mirror://alsa/utils/alsa-utils-${finalAttrs.version}.tar.bz2";
-    hash = "sha256-eqqvv7AZQhE+wMMeUfcFkQ6BB5IFCIyi+PE3o4aeGjo=";
+    hash = "sha256-CSOZ1eh0mh1eGI45MVdSHOxLdWk7YOu3m7znKM/yIyw=";
   };
 
   nativeBuildInputs = [

No auto update branch exists
Old version 1.2.15.2" not present in staging derivation file with contents: {
  lib,
  stdenv,
  directoryListingUpdater,
  fetchurl,
  alsa-lib,
  alsa-plugins,
  gettext,
  makeWrapper,
  pkg-config,
  ncurses,
  libsamplerate,
  pciutils,
  procps,
  tree,
  which,
  fftwFloat,
  pipewire,
  withPipewireLib ? true,
  symlinkJoin,
}:

let
  plugin-packages = [ alsa-plugins ] ++ lib.optional withPipewireLib pipewire;

  # Create a directory containing symlinks of all ALSA plugins.
  # This is necessary because ALSA_PLUGIN_DIR must reference only one directory.
  plugin-dir = symlinkJoin {
    name = "all-plugins";
    paths = map (path: "${path}/lib/alsa-lib") plugin-packages;
  };
in
stdenv.mkDerivation (finalAttrs: {
  pname = "alsa-utils";
  version = "1.2.16";

  src = fetchurl {
    url = "mirror://alsa/utils/alsa-utils-${finalAttrs.version}.tar.bz2";
    hash = "sha256-CSOZ1eh0mh1eGI45MVdSHOxLdWk7YOu3m7znKM/yIyw=";
  };

  nativeBuildInputs = [
    gettext
    makeWrapper
    pkg-config
  ];
  buildInputs = [
    alsa-lib
    ncurses
    libsamplerate
    fftwFloat
  ];

  configureFlags = [
    "--disable-xmlto"
    "--with-udev-rules-dir=$(out)/lib/udev/rules.d"
  ];

  installFlags = [ "ASOUND_STATE_DIR=$(TMPDIR)/dummy" ];

  postFixup = ''
    mv $out/bin/alsa-info.sh $out/bin/alsa-info
    wrapProgram $out/bin/alsa-info --prefix PATH : "${
      lib.makeBinPath [
        which
        pciutils
        procps
        tree
      ]
    }" --prefix PATH : $out/bin
    for program in $out/bin/*; do
        wrapProgram "$program" --set-default ALSA_PLUGIN_DIR "${plugin-dir}"
    done
  '';

  postInstall = ''
    # udev rules are super broken, violating `udevadm verify` in various creative ways.
    # NixOS has its own set of alsa udev rules, we can just delete the udev rules for this package
    rm -rf $out/lib/udev
  '';

  passthru.updateScript = directoryListingUpdater {
    url = "https://www.alsa-project.org/files/pub/utils/";
  };

  meta = {
    homepage = "http://www.alsa-project.org/";
    changelog = "https://github.com/alsa-project/alsa-utils/releases/tag/v${finalAttrs.version}";
    description = "ALSA, the Advanced Linux Sound Architecture utils";
    longDescription = ''
      The Advanced Linux Sound Architecture (ALSA) provides audio and
      MIDI functionality to the Linux-based operating system.
    '';

    license = with lib.licenses; [
      gpl2Plus
      gpl2Only # alsactl (init_{parse,sysdeps,sysfs,utils_{run,string}}.c, rest GPL 2.0+)
      lgpl21Plus # alsaucm
    ];

    platforms = lib.platforms.linux;
    maintainers = with lib.maintainers; [
      nick-linux
    ];
  };
})