PIP install unable to find ffi.h even though it recognizes libffi

Question

I have installed libffi on my Linux server as well as correctly set the PKG_CONFIG_PATH environment variable to the correct directory, as pip

Answer 1

You need to install the development package for libffi.

On RPM based systems (Fedora, Redhat, CentOS etc) the package is named libffi-devel.

Not sure about Debian/Ubuntu systems, I'm sure someone else will pipe up with that.