[galaxy-dev] Galaxy cannot restart : python module Crate required but installed with name "crate"

Hello, I have a very big problem with a module I've been tried to install for galaxy. I've install Crate with this command pip install Crate But when i verify in sites-packages, and in a python prompt, this module is named with a "c" and not a "C", so Galaxy cannot restart!!!! Please help me . Julie