❯ pyenv install 3.8.2 python-build: use openssl@1.1 from homebrew python-build: use readline from homebrew Installing Python-3.8.2... python-build: use readline from homebrew python-build: use zlib from xcode sdk BUILD FAILED (OS X 11.5.2 using python-build 20180424) Inspect or clean up the working tree at /var/folders/96/vjhghky10417fblgh4m1ltcw0000gn/T/python-build.20220212200129.83880 Results logged to /var/folders/96/vjhghky10417fblgh4m1ltcw0000gn/T/python-build.20220212200129.83880.log Last 10 log lines: ^ clang -c -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -g -fwrapv -O3 -Wall -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include -std=c99 -Wextra -Wno-unused-result -Wno-unused-parameter -Wno-missing-field-initializers -Wstrict-prototypes -Werror=implicit-function-declaration -I./Include/internal -I. -I./Include -I/usr/local/opt/readline/include -I/usr/local/opt/readline/include -I/Users/hiro_takkii/.pyenv/versions/3.8.2/include -I/usr/local/opt/zlib/include -I/usr/local/opt/readline/include -I/usr/local/opt/readline/include -I/Users/hiro_takkii/.pyenv/versions/3.8.2/include -I/usr/local/opt/zlib/include -DPy_BUILD_CORE -o Modules/gcmodule.o Modules/gcmodule.c clang -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -g -fwrapv -O3 -Wall -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include -std=c99 -Wextra -Wno-unused-result -Wno-unused-parameter -Wno-missing-field-initializers -Wstrict-prototypes -Werror=implicit-function-declaration -I./Include/internal -I. -I./Include -I/usr/local/opt/readline/include -I/usr/local/opt/readline/include -I/Users/hiro_takkii/.pyenv/versions/3.8.2/include -I/usr/local/opt/zlib/include -I/usr/local/opt/readline/include -I/usr/local/opt/readline/include -I/Users/hiro_takkii/.pyenv/versions/3.8.2/include -I/usr/local/opt/zlib/include -DPy_BUILD_CORE_BUILTIN -DPy_BUILD_CORE_BUILTIN -I./Include/internal -c ./Modules/posixmodule.c -o Modules/posixmodule.o ./Modules/posixmodule.c:9197:15: error: implicit declaration of function 'sendfile' is invalid in C99 [-Werror,-Wimplicit-function-declaration] ret = sendfile(in, out, offset, &sbytes, &sf, flags); ^ 1 error generated. make: *** [Modules/posixmodule.o] Error 1 make: *** Waiting for unfinished jobs.... 1 warning generated. 

> Install with the --patch flag pyenv install --patch 3.8.2 < <(curl -sSL https://github.com/python/cpython/commit/8ea6353.patch) python-build: use openssl@1.1 from homebrew python-build: use readline from homebrew Installing Python-3.8.2... patching file Misc/NEWS.d/next/macOS/2020-06-24-13-51-57.bpo-41100.mcHdc5.rst patching file configure Hunk #1 succeeded at 3394 (offset -32 lines). patching file configure.ac Hunk #1 succeeded at 498 (offset -12 lines). python-build: use readline from homebrew python-build: use zlib from xcode sdk Installed Python-3.8.2 to /Users/hiro_takkii/.pyenv/versions/3.8.2