[Answer]-Environment error while installing django-cms on Ubuntu

Assuming you’re on Ubuntu 14.04 or later, run sudo apt-get install libtiff5-dev libjpeg8-dev zlib1g-dev libfreetype6-dev liblcms2-dev libwebp-dev tcl8.6-dev tk8.6-dev python-tk, then re-install Pillow in your virtualenv (or re-create the virtualenv).