itsdangerous error log on kivy-ios

toolchain.py:93: DeprecationWarning: ChromeDownloader style of invoking requests is deprecated. Use newer urlopen functions/methods
  urlretrieve = ChromeDownloader().retrieve
[INFO    ] Building with 12 processes, where supported
[INFO    ] Want to build ['itsdangerous']
[INFO    ] Loaded recipe itsdangerous (depends of ['python3'], optional are [])
[INFO    ] Loaded recipe python3 (depends of ['hostpython3', 'libffi', 'openssl'], optional are [])
[INFO    ] Loaded recipe hostpython3 (depends of [], optional are ['openssl'])
[INFO    ] Loaded recipe libffi (depends of [], optional are [])
[INFO    ] Loaded recipe openssl (depends of [], optional are [])
[INFO    ] Build order is ['libffi', 'openssl', 'hostpython3', 'python3', 'itsdangerous']
[INFO    ] Recipe order is ['libffi', 'openssl', 'hostpython3', 'python3', 'itsdangerous']
[INFO    ] Include dir added: {arch.arch}/ffi
[INFO    ] Include dir added: {arch.arch}/openssl
[INFO    ] Global: hostpython located at /Users/richard/Repos/kivy-ios/dist/hostpython3/bin/python
[INFO    ] Global: hostpgen located at /Users/richard/Repos/kivy-ios/dist/hostpython3/bin/pgen
[DEBUG   ] Cached result: Download libffi. Ignoring
[DEBUG   ] Cached result: Extract libffi. Ignoring
[DEBUG   ] Cached result: Build_all libffi. Ignoring
[DEBUG   ] Cached result: Download openssl. Ignoring
[DEBUG   ] Cached result: Extract openssl. Ignoring
[DEBUG   ] Cached result: Build_all openssl. Ignoring
[DEBUG   ] Cached result: Download hostpython3. Ignoring
[DEBUG   ] Cached result: Extract hostpython3. Ignoring
[DEBUG   ] Cached result: Build_all hostpython3. Ignoring
[DEBUG   ] Cached result: Download python3. Ignoring
[DEBUG   ] Cached result: Extract python3. Ignoring
[DEBUG   ] Cached result: Build_all python3. Ignoring
[DEBUG   ] Cached result: Download itsdangerous. Ignoring
[DEBUG   ] Cached result: Extract itsdangerous. Ignoring
[INFO    ] Build_all itsdangerous
[INFO    ] Build itsdangerous for x86_64, arm64 (filtered)
[DEBUG   ] Cached result: Build itsdangerous. Ignoring
[DEBUG   ] Cached result: Build itsdangerous. Ignoring
[INFO    ] Install include files for itsdangerous
[DEBUG   ] Cached result: Install_include itsdangerous. Ignoring
[INFO    ] Install frameworks for itsdangerous
[DEBUG   ] Cached result: Install_frameworks itsdangerous. Ignoring
[INFO    ] Install sources for itsdangerous
[DEBUG   ] Cached result: Install_sources itsdangerous. Ignoring
[INFO    ] Install itsdangerous
[INFO    ] CC and CXX will not use ccache
[INFO    ] Running Shell: /Users/richard/Repos/kivy-ios/dist/hostpython3/bin/python ('setup.py', 'install', '--prefix', '/Users/richard/Repos/kivy-ios/dist/root/python3') {'_env': {'CC': '/var/folders/fb/x41km3811v36_hbq21l4kdnw0000gn/T/tmpc8b8mgek', 'CXX': '/var/folders/fb/x41km3811v36_hbq21l4kdnw0000gn/T/tmp0qfg8_3p', 'AR': '/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ar', 'LD': '/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld', 'OTHER_CFLAGS': '-I/Users/richard/Repos/kivy-ios/dist/include/x86_64/ffi -I/Users/richard/Repos/kivy-ios/dist/include/x86_64/openssl -I/Users/richard/Repos/kivy-ios/dist/include/x86_64', 'OTHER_LDFLAGS': '-L/Users/richard/Repos/kivy-ios/dist/lib', 'CFLAGS': '-O3 -miphoneos-version-min=8.0 -I/Users/richard/Repos/kivy-ios/dist/include/x86_64/ffi -I/Users/richard/Repos/kivy-ios/dist/include/x86_64/openssl -I/Users/richard/Repos/kivy-ios/dist/include/x86_64', 'LDFLAGS': '-arch x86_64 --sysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator12.4.sdk -L/Users/richard/Repos/kivy-ios/dist/lib -lsqlite3 -miphoneos-version-min=8.0', 'PYTHONPATH': '/Users/richard/Repos/kivy-ios/dist/root/python3/lib/python3.7/site-packages'}, '_iter': True, '_out_bufsize': 1, '_err_to_out': True}
[DEBUG   ] /Users/richard/Repos/kivy-ios/dist/hostpython3/lib/python3.7/distutils/dist.py:274: UserWarning: Unknown distribution option: 'project_urls'
[DEBUG   ]   warnings.warn(msg)
[DEBUG   ] running install
[DEBUG   ] running bdist_egg
[DEBUG   ] running egg_info
[DEBUG   ] writing src/itsdangerous.egg-info/PKG-INFO
[DEBUG   ] writing dependency_links to src/itsdangerous.egg-info/dependency_links.txt
[DEBUG   ] writing top-level names to src/itsdangerous.egg-info/top_level.txt
[DEBUG   ] reading manifest file 'src/itsdangerous.egg-info/SOURCES.txt'
[DEBUG   ] reading manifest template 'MANIFEST.in'
[DEBUG   ] no previously-included directories found matching 'docs/_build'
[DEBUG   ] no previously-included directories found matching 'tests/.hypothesis'
[DEBUG   ] warning: no previously-included files matching '*.py[co]' found anywhere in distribution
[DEBUG   ] writing manifest file 'src/itsdangerous.egg-info/SOURCES.txt'
[DEBUG   ] installing library code to build/bdist.macosx-10.14-x86_64/egg
[DEBUG   ] running install_lib
[DEBUG   ] running build_py
[DEBUG   ] copying src/itsdangerous.egg-info/PKG-INFO -> build/bdist.macosx-10.14-x86_64/egg/EGG-INFO
[DEBUG   ] copying src/itsdangerous.egg-info/SOURCES.txt -> build/bdist.macosx-10.14-x86_64/egg/EGG-INFO
[DEBUG   ] copying src/itsdangerous.egg-info/dependency_links.txt -> build/bdist.macosx-10.14-x86_64/egg/EGG-INFO
[DEBUG   ] copying src/itsdangerous.egg-info/top_level.txt -> build/bdist.macosx-10.14-x86_64/egg/EGG-INFO
[DEBUG   ] zip_safe flag not set; analyzing archive contents...
[DEBUG   ] Traceback (most recent call last):
[DEBUG   ]   File "setup.py", line 45, in <module>
[DEBUG   ]     "Programming Language :: Python :: 3.7",
[DEBUG   ]   File "/Users/richard/Repos/kivy-ios/dist/hostpython3/lib/python3.7/distutils/core.py", line 148, in setup
[DEBUG   ]     dist.run_commands()
[DEBUG   ]   File "/Users/richard/Repos/kivy-ios/dist/hostpython3/lib/python3.7/distutils/dist.py", line 966, in run_commands
[DEBUG   ]     self.run_command(cmd)
[DEBUG   ]   File "/Users/richard/Repos/kivy-ios/dist/hostpython3/lib/python3.7/distutils/dist.py", line 985, in run_command
[DEBUG   ]     cmd_obj.run()
[DEBUG   ]   File "/Users/richard/Repos/kivy-ios/dist/hostpython3/lib/python3.7/site-packages/setuptools/command/install.py", line 67, in run
[DEBUG   ]     self.do_egg_install()
[DEBUG   ]   File "/Users/richard/Repos/kivy-ios/dist/hostpython3/lib/python3.7/site-packages/setuptools/command/install.py", line 109, in do_egg_install
[DEBUG   ]     self.run_command('bdist_egg')
[DEBUG   ]   File "/Users/richard/Repos/kivy-ios/dist/hostpython3/lib/python3.7/distutils/cmd.py", line 313, in run_command
[DEBUG   ]     self.distribution.run_command(command)
[DEBUG   ]   File "/Users/richard/Repos/kivy-ios/dist/hostpython3/lib/python3.7/distutils/dist.py", line 985, in run_command
[DEBUG   ]     cmd_obj.run()
[DEBUG   ]   File "/Users/richard/Repos/kivy-ios/dist/hostpython3/lib/python3.7/site-packages/setuptools/command/bdist_egg.py", line 209, in run
[DEBUG   ]     os.path.join(archive_root, 'EGG-INFO'), self.zip_safe()
[DEBUG   ]   File "/Users/richard/Repos/kivy-ios/dist/hostpython3/lib/python3.7/site-packages/setuptools/command/bdist_egg.py", line 245, in zip_safe
[DEBUG   ]     return analyze_egg(self.bdist_dir, self.stubs)
[DEBUG   ]   File "/Users/richard/Repos/kivy-ios/dist/hostpython3/lib/python3.7/site-packages/setuptools/command/bdist_egg.py", line 355, in analyze_egg
[DEBUG   ]     safe = scan_module(egg_dir, base, name, stubs) and safe
[DEBUG   ]   File "/Users/richard/Repos/kivy-ios/dist/hostpython3/lib/python3.7/site-packages/setuptools/command/bdist_egg.py", line 395, in scan_module
[DEBUG   ]     symbols = dict.fromkeys(iter_symbols(code))
[DEBUG   ]   File "/Users/richard/Repos/kivy-ios/dist/hostpython3/lib/python3.7/site-packages/setuptools/command/bdist_egg.py", line 414, in iter_symbols
[DEBUG   ]     for name in code.co_names:
[DEBUG   ] AttributeError: 'ellipsis' object has no attribute 'co_names'
Traceback (most recent call last):
  File "toolchain.py", line 1568, in <module>
    ToolchainCL()
  File "toolchain.py", line 1281, in __init__
    getattr(self, args.command)()
  File "toolchain.py", line 1322, in build
    build_recipes(args.recipe, ctx)
  File "toolchain.py", line 1158, in build_recipes
    recipe.execute()
  File "/Users/richard/Repos/kivy-ios/toolchain.py", line 729, in execute
    self.build_all()
  File "/Users/richard/Repos/kivy-ios/toolchain.py", line 84, in _cache_execution
    f(self, *args, **kwargs)
  File "/Users/richard/Repos/kivy-ios/toolchain.py", line 862, in build_all
    self.install()
  File "/Users/richard/Repos/kivy-ios/recipes/itsdangerous/__init__.py", line 21, in install
    shprint(hostpython, "setup.py", "install", "--prefix", dest_dir, _env=build_env)
  File "/Users/richard/Repos/kivy-ios/toolchain.py", line 67, in shprint
    for line in cmd:
  File "tools/external/sh.py", line 565, in next
    self.wait()
  File "tools/external/sh.py", line 500, in wait
    self.handle_command_exit_code(exit_code)
  File "tools/external/sh.py", line 516, in handle_command_exit_code
    raise exc(self.ran, self.process.stdout, self.process.stderr)
sh.ErrorReturnCode_1: 

  RAN: '/Users/richard/Repos/kivy-ios/dist/hostpython3/bin/python setup.py install --prefix /Users/richard/Repos/kivy-ios/dist/root/python3'

  STDOUT:
/Users/richard/Repos/kivy-ios/dist/hostpython3/lib/python3.7/distutils/dist.py:274: UserWarning: Unknown distribution option: 'project_urls'
  warnings.warn(msg)
running install
running bdist_egg
running egg_info
writing src/itsdangerous.egg-info/PKG-INFO
writing dependency_links to src/itsdangerous.egg-info/dependency_links.txt
writing top-level names to src/itsdangerous.egg-info/top_level.txt
reading manifest file 'src/itsdangerous.egg-info/SOURCES.txt'
reading manifest template 'MANIFEST.in'
no previously-included directories found matching 'docs/_build'
no previously-included directories found matching 'tests/.hypothesis'
warning: no previously-included files matching '*.py[co]' found anywhere in distribution
writing manifest file 'src/... (2731 more, please see e.stdout)

  STDERR: