Error from pip install: "RuntimeError: maximum recursion depth exceeded while calling a Python object"
<p>I get an error when running </p>

<pre><code>pip install datapkg
</code></pre>

<p>The error is this: </p>

<pre><code>"RuntimeError: maximum recursion depth exceeded while calling a Python object"
</code></pre>

<p>Partial traceback:</p>

<pre><code>RuntimeError: maximum recursion depth exceeded while calling a Python object

----------------------------------------
Command /usr/bin/python -c "import setuptools; __file__='/home/okfn/var/srvc/data.staging.wheredoesmymoneygo.org/pyenv/src/wdmmg/build/datapkg/setup.py'; execfile('/home/okfn/var/srvc/data.staging.wheredoesmymoneygo.org/pyenv/src/wdmmg/build/datapkg/setup.py')" install --single-version-externally-managed --record /tmp/pip-dV62d0-record/install-record.txt --install-headers /home/okfn/var/srvc/data.staging.wheredoesmymoneygo.org/pyenv/src/wdmmg/lib/include failed with error code 1
Exception information:
Traceback (most recent call last):
  File "/usr/lib/python2.6/dist-packages/pip.py", line 252, in main
    self.run(options, args)
  File "/usr/lib/python2.6/dist-packages/pip.py", line 410, in run
    requirement_set.install(install_options)
  File "/usr/lib/python2.6/dist-packages/pip.py", line 2017, in install
    requirement.install(install_options)
  File "/usr/lib/python2.6/dist-packages/pip.py", line 1515, in install
    cwd=self.source_dir, filter_stdout=self._filter_install, show_stdout=False)
  File "/usr/lib/python2.6/dist-packages/pip.py", line 3543, in call_subprocess
    % (command_desc, proc.returncode))
InstallationError: Command /usr/bin/python -c "import setuptools; __file__='/home/okfn/var/srvc/data.staging.wheredoesmymoneygo.org/pyenv/src/wdmmg/build/datapkg/setup.py'; execfile('/home/okfn/var/srvc/data.staging.wheredoesmymoneygo.org/pyenv/src/wdmmg/build/datapkg/setup.py')" install --single-version-externally-managed --record /tmp/pip-dV62d0-record/install-record.txt --install-headers /home/okfn/var/srvc/data.staging.wheredoesmymoneygo.org/pyenv/src/wdmmg/lib/include failed with error code 1
</code></pre>

<p>I can install other packages okay. Any ideas on how to debug this?</p>

<p>Thanks :)</p>
