How to include mpl_toolkits in a Python PEX file

I would like to create a PEX file from a script I wrote that imports mpl_toolkits.basemap

. I've tried several things, including downloading the basemap .tar.gz, expanding it and placing it in my working directory and trying to use it as source.

pex -r numpy -r matplotlib -s basemap-1.0.7 -s my_project -e my_project.my_project:main -o project.pex

      

        
        
        
      

    

Running the resulting PEX file throws the following error:

Traceback (most recent call last):
  File "/Users/connor/venv/scan_directory.pex/.bootstrap/_pex/pex.py", line 216, in execute
    working_set = self._env.activate()
  File "/Users/connor/venv/scan_directory.pex/.bootstrap/_pex/environment.py", line 123, in activate
    self._working_set = self._activate()
  File "/Users/connor/venv/scan_directory.pex/.bootstrap/_pex/environment.py", line 143, in _activate
    resolved = working_set.resolve(all_reqs, env=self)
  File "/Users/connor/venv/scan_directory.pex/.bootstrap/pkg_resources.py", line 639, in resolve
    raise DistributionNotFound(req)
DistributionNotFound: mpl-toolkits.basemap

      

        
        
        
      

    

My script is in the package directory with a file setup.py

and a separate directory containing my source code and an empty file __init__.py

, and I think that is mostly good. This is my setup.py

script,

from setuptools import setup, find_packages
setup( name='my_project',
       version='0.1',
       install_requires=[ 'numpy',\
                          'matplotlib',\
                          'mpl_toolkits.basemap'],
       packages=find_packages() )

      

        
        
        
      

    

Should I add statements to __init__.py

?