Running nixpkgs-update (https://nix-community.org/update-bot/) with UPDATE_INFO: cpuinfo 0 -> 1
attrpath: cpuinfo
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/hs9m7xx8c6h7fg124waxq05qbi0jcppw-packages.json.drv
building '/nix/store/hs9m7xx8c6h7fg124waxq05qbi0jcppw-packages.json.drv'...

Going to be running update for following packages:
 - cpuinfo-0-unstable-2025-12-09

Press Enter key to continue...
Running update for:
Enqueuing group of 1 packages
 - cpuinfo-0-unstable-2025-12-09: UPDATING ...
 - cpuinfo-0-unstable-2025-12-09: DONE.

Packages updated!

Diff after rewrites:
diff --git a/pkgs/by-name/cp/cpuinfo/package.nix b/pkgs/by-name/cp/cpuinfo/package.nix
index aba43c6c3735..c2966948af5c 100644
--- a/pkgs/by-name/cp/cpuinfo/package.nix
+++ b/pkgs/by-name/cp/cpuinfo/package.nix
@@ -10,13 +10,13 @@
 }:
 stdenv.mkDerivation (finalAttrs: {
   pname = "cpuinfo";
-  version = "0-unstable-2025-12-09";
+  version = "0-unstable-2026-01-14";
 
   src = fetchFromGitHub {
     owner = "pytorch";
     repo = "cpuinfo";
-    rev = "ff24ffee8340fbd9001cce6a9ef41cdd16aa2bd3";
-    hash = "sha256-lvsM/K0CDknsGN/ZXSZCg6nr6BLMQce8wlHncjGHMdk=";
+    rev = "c4b4f4bf08c0cf486fc3111d0244ebf2a48ad01b";
+    hash = "sha256-5c9WFsfEfCoqKI6nGQ99OcaAnXsTFGyFIENK+HV/Ub4=";
   };
 
   passthru.updateScript = nix-update-script { extraArgs = [ "--version=branch" ]; };
@@ -50,7 +50,7 @@ stdenv.mkDerivation (finalAttrs: {
     mainProgram = "cpu-info";
     maintainers = with lib.maintainers; [ pawelchcki ];
     pkgConfigModules = [ "libcpuinfo" ];
-    # https://github.com/pytorch/cpuinfo/blob/ff24ffee8340fbd9001cce6a9ef41cdd16aa2bd3/CMakeLists.txt#L98
+    # https://github.com/pytorch/cpuinfo/blob/c4b4f4bf08c0cf486fc3111d0244ebf2a48ad01b/CMakeLists.txt#L98
     platforms = lib.platforms.x86 ++ lib.platforms.aarch ++ lib.platforms.riscv;
   };
 })

An auto update branch exists with message `cpuinfo: 0-unstable-2025-12-09 -> 0-unstable-2026-01-14`. New version is 0-unstable-2026-01-14.
An auto update branch exists with an equal or greater version