pkg/59928: py-lxml build failure on NetBSD/evbppc

>Number:         59928
>Category:       pkg
>Synopsis:       py-lxml build failure on NetBSD/evbppc
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Jan 18 02:30:00 +0000 2026
>Originator:     Jared McNeill
>Release:        pkgsrc -current
>Organization:
>Environment:
NetBSD nintendo 11.99.5 NetBSD 11.99.5 (NINTENDO.MP) #27: Sat Jan 17 09:59:48 AST 2026  jmcneill@berserk:/home/jmcneill/netbsd/obj/sys/arch/evbppc/compile/NINTENDO.MP evbppc
>Description:
=> Bootstrap dependency digest>=20211023: found digest-20220214
===> Skipping vulnerability checks.
WARNING: No /usr/pkg/pkgdb/pkg-vulnerabilities file found.
WARNING: To fix run: `/usr/sbin/pkg_admin -K /usr/pkg/pkgdb fetch-pkg-vulnerabilities'.
===> Building for py313-lxml-6.0.2nb1
* Building wheel...
Traceback (most recent call last):
  File "/usr/pkg/lib/python3.13/site-packages/pyproject_hooks/_in_process/_in_process.py", line 389, in <module>
    main()
    ~~~~^^
  File "/usr/pkg/lib/python3.13/site-packages/pyproject_hooks/_in_process/_in_process.py", line 373, in main
    json_out["return_val"] = hook(**hook_input["kwargs"])
                             ~~~~^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/pkg/lib/python3.13/site-packages/pyproject_hooks/_in_process/_in_process.py", line 280, in build_wheel
    return _build_backend().build_wheel(
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
        wheel_directory, config_settings, metadata_directory
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "/usr/pkg/lib/python3.13/site-packages/setuptools/build_meta.py", line 432, in build_wheel
    return _build(['bdist_wheel'])
  File "/usr/pkg/lib/python3.13/site-packages/setuptools/build_meta.py", line 423, in _build
    return self._build_with_temp_dir(
           ~~~~~~~~~~~~~~~~~~~~~~~~~^
        cmd,
        ^^^^
    ...<3 lines>...
        self._arbitrary_args(config_settings),
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "/usr/pkg/lib/python3.13/site-packages/setuptools/build_meta.py", line 404, in _build_with_temp_dir
    self.run_setup()
    ~~~~~~~~~~~~~~^^
  File "/usr/pkg/lib/python3.13/site-packages/setuptools/build_meta.py", line 512, in run_setup
    super().run_setup(setup_script=setup_script)
    ~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/pkg/lib/python3.13/site-packages/setuptools/build_meta.py", line 317, in run_setup
    exec(code, locals())
    ~~~~^^^^^^^^^^^^^^^^
  File "<string>", line 20, in <module>
  File "/home/jmcneill/netbsd/pkgsrc/textproc/py-lxml/work/lxml-6.0.2/setupinfo.py", line 7, in <module>
    from setuptools.command.build_ext import build_ext as _build_ext
  File "/usr/pkg/lib/python3.13/site-packages/setuptools/command/build_ext.py", line 31, in <module>
    __import__('Cython.Compiler.Main')
    ~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/pkg/lib/python3.13/site-packages/Cython/Compiler/Main.py", line 20, in <module>
    from . import Errors
  File "/usr/pkg/lib/python3.13/site-packages/Cython/Compiler/Errors.py", line 17, in <module>
    from ..Utils import open_new_file
zlib.error: Error -3 while decompressing data: incorrect data check

ERROR Backend subprocess exited when trying to invoke build_wheel
*** Error code 1

Stop.
make[1]: stopped making "all" in /home/jmcneill/netbsd/pkgsrc/textproc/py-lxml
*** Error code 1

Stop.
make: stopped making "all" in /home/jmcneill/netbsd/pkgsrc/textproc/py-lxml

>How-To-Repeat:

>Fix: