Installing Cryptography (cffi) on M1 Mac

When trying to install dependencies with Pipenv

[pipenv.exceptions.InstallError]: running build_ext
[pipenv.exceptions.InstallError]: building '_cffi_backend' extension
[pipenv.exceptions.InstallError]: creating build/temp.macosx-10.14-arm64-3.8
[pipenv.exceptions.InstallError]: creating build/temp.macosx-10.14-arm64-3.8/c
[pipenv.exceptions.InstallError]: clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -iwithsysroot/System/Library/Frameworks/System.framework/PrivateHeaders -iwithsysroot/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.8/Headers -arch arm64 -arch x86_64 -Werror=implicit-function-declaration -I/opt/homebrew/include -I/opt/homebrew/opt/openssl/include -DUSE__THREAD -DHAVE_SYNC_SYNCHRONIZE -I/usr/include/ffi -I/usr/include/libffi -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/ffi -I/Users/ytyng/workspace/ytyng-blog/.venv/include -I/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.8/include/python3.8 -c c/_cffi_backend.c -o build/temp.macosx-10.14-arm64-3.8/c/_cffi_backend.o
[pipenv.exceptions.InstallError]: c/_cffi_backend.c:5854:2: error: Apple Arm64 ABI requires ffi_prep_cif_var
[pipenv.exceptions.InstallError]: #error Apple Arm64 ABI requires ffi_prep_cif_var
[pipenv.exceptions.InstallError]: ^
[pipenv.exceptions.InstallError]: c/_cffi_backend.c:6304:9: error: implicit declaration of function 'ffi_prep_closure' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
[pipenv.exceptions.InstallError]: if (ffi_prep_closure(closure, &cif_descr->cif,
[pipenv.exceptions.InstallError]: ^
[pipenv.exceptions.InstallError]: 2 errors generated.
[pipenv.exceptions.InstallError]: error: command 'clang' failed with exit status 1
[pipenv.exceptions.InstallError]: ----------------------------------------
[pipenv.exceptions.InstallError]: ERROR: Command errored out with exit status 1: /Users/ytyng/workspace/ytyng-blog/.venv/bin/python -u -c 'import io, os, sys, setuptools, tokenize; sys.argv[0] = '"'"'/private/var/folders/h2/rl5s4kl5763gtb1bz7fxg0m80000gn/T/pip-install-9zuwn3fi/cffi_392525a718154d91adb0ac1a457c368c/setup.py'"'"'; __file__='"'"'/private/var/folders/h2/rl5s4kl5763gtb1bz7fxg0m80000gn/T/pip-install-9zuwn3fi/cffi_392525a718154d91adb0ac1a457c368c/setup.py'"'"';f = getattr(tokenize, '"'"'open'"'"', open)(__file__) if os.path.exists(__file__) else io.StringIO('"'"'from setuptools import setup; setup()'"'"');code = f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /private/var/folders/h2/rl5s4kl5763gtb1bz7fxg0m80000gn/T/pip-record-zgqqq7w_/install-record.txt --single-version-externally-managed --compile --install-headers /Users/ytyng/workspace/ytyng-blog/.venv/include/site/python3.8/cffi Check the logs for full command output.

If such an error occurs

LDFLAGS="-L$(brew --prefix openssl@1.1)/lib" CFLAGS="-I$(brew --prefix openssl@1.1)/include" python3 -m pip install cryptography

https://stackoverflow.com/questions/66035003/installing-cryptography-on-an-apple-silicon-m1-mac