requirements build failed at brotli

[ecLAllanon]

pip install -r requirements.txt for few setups on FreeBSD 12 (in my case it's XigmaNAS) build failed at brotli

Building wheel for brotli (setup.py) ... error ERROR: Command errored out with exit status 1: command: /usr/local/bin/python -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-w70crtv8/brotli/setup.py'"'"'; file='"'"'/tmp/pip-install-w70crtv8/brotli/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 /tmp/pip-wheel-zb0yjfpm cwd: /tmp/pip-install-w70crtv8/brotli/ Complete output (16 lines): running bdist_wheel running build running build_py creating bin creating bin/lib.freebsd-12.1-RELEASE-p3-amd64-3.7 copying python/brotli.py -> bin/lib.freebsd-12.1-RELEASE-p3-amd64-3.7 running build_ext building '_brotli' extension creating bin/temp.freebsd-12.1-RELEASE-p3-amd64-3.7 creating bin/temp.freebsd-12.1-RELEASE-p3-amd64-3.7/c creating bin/temp.freebsd-12.1-RELEASE-p3-amd64-3.7/c/common creating bin/temp.freebsd-12.1-RELEASE-p3-amd64-3.7/c/dec creating bin/temp.freebsd-12.1-RELEASE-p3-amd64-3.7/c/enc cc -pthread -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -O2 -pipe -fstack-protector-strong -fno-strict-aliasing -fPIC -Ic/include -I/usr/local/include/python3.7m -c c/common/dictionary.c -o bin/temp.freebsd-12.1-RELEASE-p3-amd64-3.7/c/common/dictionary.o unable to execute 'cc': No such file or directory error: command 'cc' failed with exit status 1

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ERROR: Failed building wheel for brotli

SOLUTION brotli must be installed from binary package:

pkg install py37-brotli

Maybe must be included in readme?