python3.12 'StringIOTree.cpython-312-x86_64-cygwin.dll' (0x6C0000) is already occupied

I'm trying to move duplicity python package move from python3.9 to 3.12. The cygport file 
is using python3-wheel.

For python 3.9 it works, for Python 3.12 I have the below error. I tried re-installing 
python packages, even doing `C:\cygwin64\bin\dash.exe -c /usr/bin/rebaseall`, reboot to 
make sure there's no stale cygwin.dll. No change. Any tips how to try to find the culprit 
or fix?


```bash
$ cygport duplicity.cygport download all-test check

 >>> Preparing duplicity-3.0.7-2.x86_64
 >>> Unpacking source duplicity-rel.3.0.7.tar.gz
*** Info: applying patch 01-docdir.patch (-p2):
patching file setup.py
Hunk #1 succeeded at 113 with fuzz 1 (offset 14 lines).
 >>> Preparing working source directory
 >>> Compiling duplicity-3.0.7-2.x86_64
Processing /home/libor/cyg-port/duplicity/duplicity-3.0.7-2.x86_64/build
   Preparing metadata (pyproject.toml): started
       0 [main] python3.12 5948 child_info_fork::abort: address space needed by 
'StringIOTree.cpython-312-x86_64-cygwin.dll' (0x6C0000) is already occupied
   Preparing metadata (pyproject.toml): finished with status 'error'
   error: subprocess-exited-with-error

   × Preparing metadata (pyproject.toml) did not run successfully.
   │ exit code: 1
   ╰─> [25 lines of output]
             0 [main] python3.12 5948 child_info_fork::abort: address space needed by 
'StringIOTree.cpython-312-x86_64-cygwin.dll' (0x6C0000) is already occupied
       Traceback (most recent call last):
         File 
"/usr/lib/python3.12/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", 
line 389, in <module>
           main()
         File 
"/usr/lib/python3.12/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", 
line 373, in main
           json_out["return_val"] = hook(**hook_input["kwargs"])
                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
         File 
"/usr/lib/python3.12/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", 
line 175, in prepare_metadata_for_build_wheel
           return hook(metadata_directory, config_settings)
                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
         File "/usr/lib/python3.12/site-packages/setuptools/build_meta.py", line 374, in 
prepare_metadata_for_build_wheel
           self.run_setup()
         File "/usr/lib/python3.12/site-packages/setuptools/build_meta.py", line 317, in 
run_setup
           exec(code, locals())
         File "<string>", line 187, in <module>
         File "<string>", line 144, in get_data_files
         File "/usr/lib/python3.12/subprocess.py", line 548, in run
           with Popen(*popenargs, **kwargs) as process:
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^
         File "/usr/lib/python3.12/subprocess.py", line 1026, in __init__
           self._execute_child(args, executable, preexec_fn, close_fds,
         File "/usr/lib/python3.12/subprocess.py", line 1885, in _execute_child
           self.pid = _fork_exec(
                      ^^^^^^^^^^^
       BlockingIOError: [Errno 11] Resource temporarily unavailable
       [end of output]

   note: This error originates from a subprocess, and is likely not a problem with pip.
error: metadata-generation-failed

× Encountered error while generating package metadata.
╰─> from file:///home/libor/cyg-port/duplicity/duplicity-3.0.7-2.x86_64/build

note: This is an issue with the package mentioned above, not pip.
hint: See above for details.
*** ERROR: pip3.12 wheel failed
```



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