The #11526 was badly rebased just before beta1 relase and few
lines installing the providers were lost.


setup.py
"""
    Command to tidy up the project root.
    Registered as cmdclass in setup() so it can be called with ``python setup.py extra_clean``.
    """
    description = "Tidy up the project root"
    user_options = []  
    def initialize_options(self):
        """Set default values for options."""
    def finalize_options(self):
        """Set final values for options."""
    def run(self):  
        """Run command to remove temporary files and directories."""
        os.chdir(my_dir)
        os.system('rm -vrf ./build ./dist ./*.pyc ./*.tgz ./*.egg-info')
class CompileAssets(Command):