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/v9wh2wz1j5ic5h6zl18xck5rbmdw8lsl-packages.json.drv
building '/nix/store/v9wh2wz1j5ic5h6zl18xck5rbmdw8lsl-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
There might already be an open PR for this update:
- alsa-{lib,utils,ucm-conf}: 1.2.15.x -> 1.2.16
  URL "https://api.github.com/repos/NixOS/nixpkgs/issues/527444"