Running nixpkgs-update (https://nix-community.org/update-bot/) with UPDATE_INFO: django-upgrade 0 -> 1
attrpath: django-upgrade
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/h1di9h6blclwy7gr20d3hn066a1kl3l9-packages.json.drv
building '/nix/store/h1di9h6blclwy7gr20d3hn066a1kl3l9-packages.json.drv'...
structuredAttrs is enabled

Going to be running update for following packages:
 - django-upgrade-1.31.1

Press Enter key to continue...
Running update for:
Enqueuing group of 1 packages
 - django-upgrade-1.31.1: UPDATING ...
 - django-upgrade-1.31.1: DONE.

Packages updated!

Diff after rewrites:
diff --git a/pkgs/by-name/dj/django-upgrade/package.nix b/pkgs/by-name/dj/django-upgrade/package.nix
index de9163300556..39c168d38ac3 100644
--- a/pkgs/by-name/dj/django-upgrade/package.nix
+++ b/pkgs/by-name/dj/django-upgrade/package.nix
@@ -7,14 +7,14 @@
 
 python3Packages.buildPythonApplication (finalAttrs: {
   pname = "django-upgrade";
-  version = "1.31.1";
+  version = "1.32.0";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "adamchainz";
     repo = "django-upgrade";
     tag = finalAttrs.version;
-    hash = "sha256-6x1542ieT+G/r3IiCw4aLePY3HLzpycI7FOBqHm1fmE=";
+    hash = "sha256-rAu274CTG8OtggqH4gzfLUmGchua7tUoWeqwMtuhvqE=";
   };
 
   build-system = [ python3Packages.setuptools ];

No auto update branch exists
Received ExitFailure 1 when running
Raw command: nix-build --option sandbox true --arg config "{ allowUnfree = true; allowAliases = false; }" --arg overlays "[ ]" -A django-upgrade
nix build failed.
Using pytestCheckPhase
Using versionCheckHook
Running phase: unpackPhase
@nix { "action": "setPhase", "phase": "unpackPhase" }
unpacking source archive /nix/store/qcrlc0j408dl9vm1g7g5xhlbbkjdj3k8-source
source root is source
setting SOURCE_DATE_EPOCH to timestamp 315619200 of file "source/uv.lock"
Running phase: patchPhase
@nix { "action": "setPhase", "phase": "patchPhase" }
Running phase: updateAutotoolsGnuConfigScriptsPhase
@nix { "action": "setPhase", "phase": "updateAutotoolsGnuConfigScriptsPhase" }
Running phase: configurePhase
@nix { "action": "setPhase", "phase": "configurePhase" }
no configure script, doing nothing
Running phase: buildPhase
@nix { "action": "setPhase", "phase": "buildPhase" }
Executing pypaBuildPhase
Creating a wheel...
pypa build flags: --no-isolation --outdir dist/ --wheel
* Getting build dependencies for wheel...

Traceback (most recent call last):
  File "/nix/store/khhd398h6fy0alc7fjfyqssd1bz58xr1-python3.14-pyproject-hooks-1.2.0/lib/python3.14/site-packages/pyproject_hooks/_impl.py", line 402, in _call_hook
    raise BackendUnavailable(
    ...<4 lines>...
    )
pyproject_hooks._impl.BackendUnavailable: Cannot import 'uv_build'

TIP pass --env-dir and --sdist-extract-dir to keep the build environment and sources, then see https://build.pypa.io/en/stable/how-to/troubleshooting.html#debug-a-failed-build for help debugging a failed build
ERROR Backend 'uv_build' is not available.