Running nixpkgs-update (https://github.com/NixOS/infra/blob/main/non-critical-infra/modules/nixpkgs-update/README.md) with UPDATE_INFO: check-jsonschema 0.38.0 -> 0.39.0 https://github.com/python-jsonschema/check-jsonschema/releases
attrpath: check-jsonschema
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/cnm0z7pcly980wb88gnf5237q3il1zc0-packages.json.drv
building '/nix/store/cnm0z7pcly980wb88gnf5237q3il1zc0-packages.json.drv'...

Going to be running update for following packages:
 - check-jsonschema-0.38.0

Press Enter key to continue...
Running update for:
Enqueuing group of 1 packages
 - check-jsonschema-0.38.0: UPDATING ...
 - check-jsonschema-0.38.0: DONE.

Packages updated!

Diff after rewrites:
diff --git a/pkgs/by-name/ch/check-jsonschema/package.nix b/pkgs/by-name/ch/check-jsonschema/package.nix
index 7b6c7c15de36..d90c591a684f 100644
--- a/pkgs/by-name/ch/check-jsonschema/package.nix
+++ b/pkgs/by-name/ch/check-jsonschema/package.nix
@@ -6,14 +6,14 @@
 
 python3Packages.buildPythonApplication (finalAttrs: {
   pname = "check-jsonschema";
-  version = "0.38.0";
+  version = "0.39.0";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "python-jsonschema";
     repo = "check-jsonschema";
     tag = finalAttrs.version;
-    hash = "sha256-VmvcMHAROeIeGtUQhjxq/rdIzKOnjgXejbstHoA6Y14=";
+    hash = "sha256-sm/VOMLnlwUrHeil6FxWuU+aNLwxZGZ45FCp0e4/hHU=";
   };
 
   build-system = with 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 check-jsonschema
nix build failed.
Sourcing pytest-check-hook
Using pytestCheckPhase
Running phase: unpackPhase
@nix { "action": "setPhase", "phase": "unpackPhase" }
unpacking source archive /nix/store/a0rr78ahjrym5dpncn1cblz1cbsl9kia-source
source root is source
setting SOURCE_DATE_EPOCH to timestamp 315619200 of file "source/tox.ini"
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/p02mrznxq1m7blfgvpv68qg82byml80z-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 'flit_core.buildapi'

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 'flit_core.buildapi' is not available.