=> "/opt/pkg/bin/bmake" ["-C", "/data/jenkins/workspace/pkgsrc-upstream-trunk/misc/py-libtmux", "all", "BATCH=1", "DEPENDS_TARGET=/nonexistent", "PYTHON_VERSION_REQD=313"]
===> Building for py313-libtmux-0.55.1
* Building wheel...

Traceback (most recent call last):
  File "/opt/pkg/lib/python3.13/site-packages/pyproject_hooks/_impl.py", line 402, in _call_hook
    raise BackendUnavailable(
    ...<4 lines>...
    )
pyproject_hooks._impl.BackendUnavailable: Cannot import 'hatchling.build'

ERROR Backend 'hatchling.build' is not available.
*** Error code 1

Stop.
bmake[1]: stopped making "all" in /data/jenkins/workspace/pkgsrc-upstream-trunk/misc/py-libtmux
*** Error code 1

Stop.
bmake: stopped making "all" in /data/jenkins/workspace/pkgsrc-upstream-trunk/misc/py-libtmux