Error installing bcrypt with pip on OS X: can't find ffi.h (libffi is installed)

Question

I\'m getting this error when trying to install bcrypt with pip. I have libffi installed in a couple places (the Xcode OS X SDK, and from homebrew), but I don\'t know how to

Answer 1

Without using sudo and CFLAGS and CPPFLAGS (unnecessary for pip):

$ brew install pkg-config libffi
$ export PKG_CONFIG_PATH=/usr/local/Cellar/libffi/3.0.13/lib/pkgconfig/
$ pip install bcrypt