Ptpython install fails

I tried installing ptpython via pip and got:

Building wheel for regex (setup.py) ... error
ERROR: Command errored out with exit status 1:
command: /private/var/containers/Bundle/Application/0D2ED635-057F-476E-B7BA-9FE1C7BA2537/a-Shell.app/Library/bin/python3 -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/private/var/mobile/Containers/Data/Application/9A89E63C-AC7D-4079-A455-862123C66D73/tmp/pip-install-4d033nzk/regex_3902b453275544fe8b648337638336af/setup.py'"'"'; __file__='"'"'/private/var/mobile/Containers/Data/Application/9A89E63C-AC7D-4079-A455-862123C66D73/tmp/pip-install-4d033nzk/regex_3902b453275544fe8b648337638336af/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' bdist_wheel -d /private/var/mobile/Containers/Data/Application/9A89E63C-AC7D-4079-A455-862123C66D73/tmp/pip-wheel-xhhzsw42
cwd: /private/var/mobile/Containers/Data/Application/9A89E63C-AC7D-4079-A455-862123C66D73/tmp/pip-install-4d033nzk/regex_3902b453275544fe8b648337638336af/
Complete output (15 lines):
running bdist_wheel
running build
running build_py
creating build
creating build/lib.macosx-11.2-x86_64-3.9
creating build/lib.macosx-11.2-x86_64-3.9/regex
copying regex_3/__init__.py -> build/lib.macosx-11.2-x86_64-3.9/regex
copying regex_3/regex.py -> build/lib.macosx-11.2-x86_64-3.9/regex
copying regex_3/_regex_core.py -> build/lib.macosx-11.2-x86_64-3.9/regex
copying regex_3/test_regex.py -> build/lib.macosx-11.2-x86_64-3.9/regex
running build_ext
building 'regex._regex' extension
creating build/temp.macosx-11.2-x86_64-3.9
creating build/temp.macosx-11.2-x86_64-3.9/regex_3
error: ('There are no compilers available on iOS, sorry. Command was: ', ['-I/private/var/containers/Bundle/Application/0D2ED635-057F-476E-B7BA-9FE1C7BA2537/a-Shell.app/Library/include/python3.9', '-c'])
----------------------------------------
ERROR: Failed building wheel for regex
Running setup.py clean for regex
Failed to build regex
Installing collected packages: regex, pathspec, mypy-extensions, click, appdirs, prompt-toolkit, black, ptpython
Running setup.py install for regex ... error
ERROR: Command errored out with exit status 1:
command: /private/var/containers/Bundle/Application/0D2ED635-057F-476E-B7BA-9FE1C7BA2537/a-Shell.app/Library/bin/python3 -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/private/var/mobile/Containers/Data/Application/9A89E63C-AC7D-4079-A455-862123C66D73/tmp/pip-install-4d033nzk/regex_3902b453275544fe8b648337638336af/setup.py'"'"'; __file__='"'"'/private/var/mobile/Containers/Data/Application/9A89E63C-AC7D-4079-A455-862123C66D73/tmp/pip-install-4d033nzk/regex_3902b453275544fe8b648337638336af/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /private/var/mobile/Containers/Data/Application/9A89E63C-AC7D-4079-A455-862123C66D73/tmp/pip-record-fn_d8m0k/install-record.txt --single-version-externally-managed --user --prefix= --compile --install-headers /var/mobile/Containers/Data/Application/9A89E63C-AC7D-4079-A455-862123C66D73/Library/include/python3.9/regex
cwd: /private/var/mobile/Containers/Data/Application/9A89E63C-AC7D-4079-A455-862123C66D73/tmp/pip-install-4d033nzk/regex_3902b453275544fe8b648337638336af/
Complete output (15 lines):
running install
running build
running build_py
creating build
creating build/lib.macosx-11.2-x86_64-3.9
creating build/lib.macosx-11.2-x86_64-3.9/regex
copying regex_3/__init__.py -> build/lib.macosx-11.2-x86_64-3.9/regex
copying regex_3/regex.py -> build/lib.macosx-11.2-x86_64-3.9/regex
copying regex_3/_regex_core.py -> build/lib.macosx-11.2-x86_64-3.9/regex
copying regex_3/test_regex.py -> build/lib.macosx-11.2-x86_64-3.9/regex
running build_ext
building 'regex._regex' extension
creating build/temp.macosx-11.2-x86_64-3.9
creating build/temp.macosx-11.2-x86_64-3.9/regex_3
error: ('There are no compilers available on iOS, sorry. Command was: ', ['-I/private/var/containers/Bundle/Application/0D2ED6
35-057F-476E-B7BA-9FE1C7BA2537/a-Shell.app/Library/include/python3.9', '-c'])
----------------------------------------
ERROR: Command errored out with exit status 1: /private/var/containers/Bundle/Application/0D2ED635-057F-476E-B7BA-9FE1C7BA2537/a-S
hell.app/Library/bin/python3 -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/private/var/mobile/Containers/Data/Appli
cation/9A89E63C-AC7D-4079-A455-862123C66D73/tmp/pip-install-4d033nzk/regex_3902b453275544fe8b648337638336af/setup.py'"'"'; __file_
_='"'"'/private/var/mobile/Containers/Data/Application/9A89E63C-AC7D-4079-A455-862123C66D73/tmp/pip-install-4d033nzk/regex_3902b45
3275544fe8b648337638336af/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"',
'"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /private/var/mobile/Containers/Data/Applic
ation/9A89E63C-AC7D-4079-A455-862123C66D73/tmp/pip-record-fn_d8m0k/install-record.txt --single-version-externally-managed --user -
-prefix= --compile --install-headers /var/mobile/Containers/Data/Application/9A89E63C-AC7D-4079-A455-862123C66D73/Library/include/
python3.9/regex Check the logs for full command output.