Running nixpkgs-update (https://nix-community.org/update-bot/) with UPDATE_INFO: ell 0 -> 1
attrpath: ell
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/wwmx8rw9zjvwrqal9q74qnfdb064rhd2-packages.json.drv
building '/nix/store/wwmx8rw9zjvwrqal9q74qnfdb064rhd2-packages.json.drv'...

Going to be running update for following packages:
 - ell-0.81

Press Enter key to continue...
Running update for:
Enqueuing group of 1 packages
 - ell-0.81: UPDATING ...
 - ell-0.81: DONE.

Packages updated!

Diff after rewrites:
diff --git a/pkgs/by-name/el/ell/package.nix b/pkgs/by-name/el/ell/package.nix
index 8a45c1061056..23bac93bf541 100644
--- a/pkgs/by-name/el/ell/package.nix
+++ b/pkgs/by-name/el/ell/package.nix
@@ -11,7 +11,7 @@
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "ell";
-  version = "0.81";
+  version = "0.82";
 
   outputs = [
     "out"
@@ -22,7 +22,7 @@ stdenv.mkDerivation (finalAttrs: {
   src = fetchgit {
     url = "https://git.kernel.org/pub/scm/libs/ell/ell.git";
     rev = finalAttrs.version;
-    hash = "sha256-NopI9aDtpEbf2JlboLTIg/9zXaZelfYhF0/RgwUgakI=";
+    hash = "sha256-6+Aolb0Y50E5ge568je1ZdkATlCRgw8cCaW1qt0FgvE=";
   };
 
   nativeBuildInputs = [

No auto update branch exists
Old version 0.81" not present in staging derivation file with contents: {
  lib,
  stdenv,
  fetchgit,
  autoreconfHook,
  pkg-config,
  dbus,
  sysctl,
  gitUpdater,
}:

stdenv.mkDerivation (finalAttrs: {
  pname = "ell";
  version = "0.82";

  outputs = [
    "out"
    "dev"
  ];
  separateDebugInfo = true;

  src = fetchgit {
    url = "https://git.kernel.org/pub/scm/libs/ell/ell.git";
    rev = finalAttrs.version;
    hash = "sha256-6+Aolb0Y50E5ge568je1ZdkATlCRgw8cCaW1qt0FgvE=";
  };

  nativeBuildInputs = [
    pkg-config
    autoreconfHook
  ];

  nativeCheckInputs = [
    dbus
    # required as the sysctl test works on some machines
    sysctl
  ];

  enableParallelBuilding = true;

  # Runs multiple dbus instances on the same port failing the bind.
  enableParallelChecking = false;

  # 'unit/test-hwdb' fails in the sandbox as it relies on
  # '/etc/udev/hwdb.bin' file presence in the sandbox. `nixpkgs` does
  # not provide it today in any form. Let's skip the test.
  env.XFAIL_TESTS = "unit/test-hwdb";

  # tests sporadically fail on musl
  doCheck = !stdenv.hostPlatform.isMusl;

  passthru = {
    updateScript = gitUpdater {
      url = "https://git.kernel.org/pub/scm/libs/ell/ell.git";
    };
  };

  meta = {
    homepage = "https://git.kernel.org/pub/scm/libs/ell/ell.git";
    description = "Embedded Linux Library";
    longDescription = ''
      The Embedded Linux* Library (ELL) provides core, low-level functionality for system daemons. It typically has no dependencies other than the Linux kernel, C standard library, and libdl (for dynamic linking). While ELL is designed to be efficient and compact enough for use on embedded Linux platforms, it is not limited to resource-constrained systems.
    '';
    changelog = "https://git.kernel.org/pub/scm/libs/ell/ell.git/tree/ChangeLog?h=${finalAttrs.version}";
    license = lib.licenses.lgpl21Plus;
    platforms = lib.platforms.linux;
    maintainers = with lib.maintainers; [
      mic92
    ];
  };
})