Can't launch /scripts/cmdeploy test on Mac

My chatmail instance is working fine, but I just wanted to make a test, and it fails each time. I am on MacOS 15.6.1

scripts/cmdeploy test
[$ /Users/<username>/<project_dir>/venv/bin/python3.13 -m pip install deltachat]
Collecting deltachat
  Using cached deltachat-1.101.0.tar.gz (118 kB)
  Installing build dependencies ... done
  Getting requirements to build wheel ... error
  error: subprocess-exited-with-error
  
  × Getting requirements to build wheel did not run successfully.
  │ exit code: 1
  ╰─> [53 lines of output]
      Traceback (most recent call last):
        File "/Users/<username>/<project_dir>/venv/lib/python3.13/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 389, in <module>
          main()
          ~~~~^^
        File "/Users/<username>/<project_dir>/venv/lib/python3.13/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 373, in main
          json_out["return_val"] = hook(**hook_input["kwargs"])
                                   ~~~~^^^^^^^^^^^^^^^^^^^^^^^^
        File "/Users/<username>/<project_dir>/venv/lib/python3.13/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 143, in get_requires_for_build_wheel
          return hook(config_settings)
        File "/private/var/folders/.../T/pip-build-env-immfwchv/overlay/lib/python3.13/site-packages/setuptools/build_meta.py", line 331, in get_requires_for_build_wheel
          return self._get_build_requires(config_settings, requirements=[])
                 ~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/private/var/folders/.../T/pip-build-env-immfwchv/overlay/lib/python3.13/site-packages/setuptools/build_meta.py", line 301, in _get_build_requires
          self.run_setup()
          ~~~~~~~~~~~~~~^^
        File "/private/var/folders/.../T/pip-build-env-immfwchv/overlay/lib/python3.13/site-packages/setuptools/build_meta.py", line 317, in run_setup
          exec(code, locals())
          ~~~~^^^^^^^^^^^^^^^^
        File "<string>", line 4, in <module>
        File "/private/var/folders/.../T/pip-build-env-immfwchv/overlay/lib/python3.13/site-packages/setuptools/__init__.py", line 115, in setup
          return distutils.core.setup(**attrs)
                 ~~~~~~~~~~~~~~~~~~~~^^^^^^^^^
        File "/private/var/folders/.../T/pip-build-env-immfwchv/overlay/lib/python3.13/site-packages/setuptools/_distutils/core.py", line 148, in setup
          _setup_distribution = dist = klass(attrs)
                                       ~~~~^^^^^^^
        File "/private/var/folders/.../T/pip-build-env-immfwchv/overlay/lib/python3.13/site-packages/setuptools/dist.py", line 321, in __init__
          _Distribution.__init__(self, dist_attrs)
          ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^
        File "/private/var/folders/.../T/pip-build-env-immfwchv/overlay/lib/python3.13/site-packages/setuptools/_distutils/dist.py", line 309, in __init__
          self.finalize_options()
          ~~~~~~~~~~~~~~~~~~~~~^^
        File "/private/var/folders/.../T/pip-build-env-immfwchv/overlay/lib/python3.13/site-packages/setuptools/dist.py", line 784, in finalize_options
          ep(self)
          ~~^^^^^^
        File "/private/var/folders/.../T/pip-build-env-immfwchv/overlay/lib/python3.13/site-packages/setuptools/dist.py", line 804, in _finalize_setup_keywords
          ep.load()(self, ep.name, value)
          ~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^
        File "/private/var/folders/.../T/pip-build-env-immfwchv/overlay/lib/python3.13/site-packages/cffi/setuptools_ext.py", line 229, in cffi_modules
          add_cffi_module(dist, cffi_module)
          ~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
        File "/private/var/folders/.../T/pip-build-env-immfwchv/overlay/lib/python3.13/site-packages/cffi/setuptools_ext.py", line 58, in add_cffi_module
          ffi = ffi()      # maybe it's a function instead of directly an ffi
        File "src/deltachat/_build.py", line 182, in ffibuilder
          flags = system_build_flags()
        File "src/deltachat/_build.py", line 49, in system_build_flags
          return pkgconfig.parse("deltachat")
                 ~~~~~~~~~~~~~~~^^^^^^^^^^^^^
        File "/private/var/folders/.../T/pip-build-env-immfwchv/overlay/lib/python3.13/site-packages/pkgconfig/pkgconfig.py", line 248, in parse
          _raise_if_not_exists(package)
          ~~~~~~~~~~~~~~~~~~~~^^^^^^^^^
        File "/private/var/folders/.../T/pip-build-env-immfwchv/overlay/lib/python3.13/site-packages/pkgconfig/pkgconfig.py", line 103, in _raise_if_not_exists
          raise PackageNotFoundError(package)
      pkgconfig.pkgconfig.PackageNotFoundError: deltachat not found
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
ERROR: Failed to build 'deltachat' when getting requirements to build wheel
Traceback (most recent call last):
  File "/Users/<username>/<project_dir>/venv/bin/cmdeploy", line 7, in <module>
    sys.exit(main())
            ~~~~^^
  File "/Users/.../relay/cmdeploy/src/cmdeploy/cmdeploy.py", line 396, in main
    res = args.func(args, out, **kwargs)
  File "/Users/.../relay/cmdeploy/src/cmdeploy/cmdeploy.py", line 206, in test_cmd
    out.check_call(f"{sys.executable} -m pip install deltachat")
    ~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/.../relay/cmdeploy/src/cmdeploy/cmdeploy.py", line 292, in check_call
    return subprocess.check_call(arg, shell=True, env=env)
           ~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/homebrew/Cellar/python@3.13/3.13.7/Frameworks/Python.framework/Versions/3.13/lib/python3.13/subprocess.py", line 419, in check_call
    raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '/Users/.../relay/venv/bin/python3.13 -m pip install deltachat' returned non-zero exit status 1.

I opened an issue at Tests still install legacy Python bindings · Issue #733 · chatmail/relay · GitHub