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    pyca/cryptography Mac install fails with fatal error: "openssl/opensslv.h" file not found

    Published Jun 24, 2022 [  Python  ]

    When install pyca/cryptography on MacOS with python 2.7.18, we got the following error

    build/temp.macosx-10.12-x86_64-2.7/_openssl.c:433:10: fatal error: 'openssl/opensslv.h' file not found
#include <openssl/opensslv.h>

    Solution

    brew install openssl@1.1

pip install cryptography --global-option=build_ext --global-option="-L/usr/local/opt/openssl@1.1/lib" --global-option="-I/usr/local/opt/openssl@1.1/include"

    Reference