Running nixpkgs-update (https://nix-community.org/update-bot/) with UPDATE_INFO: alsa-ucm-conf 0 -> 1
attrpath: alsa-ucm-conf
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/cnny7zbbiphyyzqknsrja5frv6c3wyr4-packages.json.drv
building '/nix/store/cnny7zbbiphyyzqknsrja5frv6c3wyr4-packages.json.drv'...

Going to be running update for following packages:
 - alsa-ucm-conf-1.2.15.1

Press Enter key to continue...
Running update for:
Enqueuing group of 1 packages
 - alsa-ucm-conf-1.2.15.1: UPDATING ...
 - alsa-ucm-conf-1.2.15.1: DONE.

Packages updated!

Diff after rewrites:
diff --git a/pkgs/by-name/al/alsa-ucm-conf/package.nix b/pkgs/by-name/al/alsa-ucm-conf/package.nix
index a8390137be78..0382be154d4e 100644
--- a/pkgs/by-name/al/alsa-ucm-conf/package.nix
+++ b/pkgs/by-name/al/alsa-ucm-conf/package.nix
@@ -9,11 +9,11 @@
 
 stdenvNoCC.mkDerivation (finalAttrs: {
   pname = "alsa-ucm-conf";
-  version = "1.2.15.1";
+  version = "1.2.15.3";
 
   src = fetchurl {
     url = "mirror://alsa/lib/alsa-ucm-conf-${finalAttrs.version}.tar.bz2";
-    hash = "sha256-JGxdWdIXtvf0ehH9EPG3ZtJavLDZyZavMHm7nJrFobA=";
+    hash = "sha256-n3noE8CPyGz6Rt11xPzaGkpRtILbJgfh/PqvuS9YijE=";
   };
 
   dontBuild = true;

No auto update branch exists
There might already be an open PR for this update:
- alsa-ucm-conf: 1.2.15.1 → 1.2.15.3-unstable-2026-01-29; validate in alsa-lib
  URL "https://api.github.com/repos/NixOS/nixpkgs/issues/392058"