Error installing scrapy in virtualenv using pip
I got this error, too. The problem is
No package 'libffi' found
c/_cffi_backend.c:13:17: fatal error: ffi.h: No such file or directory
#include <ffi.h>
You should do this:
sudo apt-get install libffi-dev
From a fresh installation of 14.04, I had to install python-dev, libffi-dev, libssl-dev, libxml2-dev, and libxslt1-dev packages. Once those were installed, pip install scrapy worked fine.
sudo apt-get install python-dev libffi-dev libssl-dev libxml2-dev libxslt1-dev
pip install scrapy