Instalar CKAN localmente en OSX 10.9, basado enhttp://docs.ckan.org/en/latest/maintaining/installing/install-from-source.html.

He creado y activado el python virtualenv y ahora necesito crear un archivo de configuración CKAN:

$ paster make-config ckan /etc/ckan/default/development.ini

El resultado es el siguiente (ImportError en la última línea):

Distribution already installed:
      ckan 2.2 from ~/ckan/lib/default/src/ckan
    Traceback (most recent call last):
      File "/usr/lib/ckan/default/bin/paster", line 9, in <module>
        load_entry_point('PasteScript==1.7.5', 'console_scripts', 'paster')()
      File "/usr/lib/ckan/default/lib/python2.7/site-packages/paste/script/command.py", line 104, in run
        invoke(command, command_name, options, args[1:])
      File "/usr/lib/ckan/default/lib/python2.7/site-packages/paste/script/command.py", line 143, in invoke
        exit_code = runner.run(args)
      File "/usr/lib/ckan/default/lib/python2.7/site-packages/paste/script/appinstall.py", line 68, in run
        return super(AbstractInstallCommand, self).run(new_args)
      File "/usr/lib/ckan/default/lib/python2.7/site-packages/paste/script/command.py", line 238, in run
        result = self.command()
      File "/usr/lib/ckan/default/lib/python2.7/site-packages/paste/script/appinstall.py", line 295, in command
        self.distro, self.options.ep_group, self.options.ep_name)
      File "/usr/lib/ckan/default/lib/python2.7/site-packages/paste/script/appinstall.py", line 234, in get_installer
        'paste.app_install', ep_name)
      File "/usr/lib/ckan/default/lib/python2.7/site-packages/pkg_resources.py", line 2302, in load_entry_point
        return ep.load()
      File "/usr/lib/ckan/default/lib/python2.7/site-packages/pkg_resources.py", line 2029, in load
        entry = __import__(self.module_name, globals(),globals(), ['__name__'])
      File "~/ckan/lib/default/src/ckan/ckan/config/install.py", line 3, in <module>
        from pylons.util import PylonsInstaller
    ImportError: No module named pylons.util

No estoy seguro de cómo proceder, ¿alguna idea?