$ mktmpenv
New python executable in /Users/alex_gaynor/.virtualenvs/tempenv-4b7d34306d0a/bin/python
Installing setuptools, pip...pip install -Udone.
[14:24:47] (tempenv-4b7d34306d0a) ~/p/openstack-requirements (master)
$ pip install -U setuptools
Unpacking /Users/alex_gaynor/.pip/wheels/setuptools-4.0-py2.py3-none-any.whl
Installing collected packages: setuptools
  Found existing installation: setuptools 3.6
    Uninstalling setuptools:
      Successfully uninstalled setuptools
Successfully installed setuptools
Cleaning up...
[14:24:52] (tempenv-4b7d34306d0a) ~/p/openstack-requirements (master)
$ pip install --no-use-wheel python-daemon
Downloading/unpacking python-daemon
  Using download cache from /Users/alex_gaynor/.pip/cache/https%3A%2F%2Fpypi.python.org%2Fpackages%2Fsource%2Fp%2Fpython-daemon%2Fpython-daemon-1.6.tar.gz
  Running setup.py (path:/Users/alex_gaynor/.virtualenvs/tempenv-4b7d34306d0a/build/python-daemon/setup.py) egg_info for package python-daemon
    Traceback (most recent call last):
      File "<string>", line 17, in <module>
      File "/Users/alex_gaynor/.virtualenvs/tempenv-4b7d34306d0a/build/python-daemon/setup.py", line 62, in <module>
        u"Topic :: Software Development :: Libraries :: Python Modules",
      File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/core.py", line 152, in setup
        dist.run_commands()
      File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/dist.py", line 953, in run_commands
        self.run_command(cmd)
      File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/dist.py", line 972, in run_command
        cmd_obj.run()
      File "<string>", line 14, in replacement_run
      File "/Users/alex_gaynor/.virtualenvs/tempenv-4b7d34306d0a/lib/python2.7/site-packages/setuptools/command/egg_info.py", line 368, in write_requirements
        _write_requirements(data, dist.install_requires)
      File "/Users/alex_gaynor/.virtualenvs/tempenv-4b7d34306d0a/lib/python2.7/site-packages/setuptools/command/egg_info.py", line 363, in _write_requirements
        stream.writelines(lines)
    TypeError: 'unicode' does not have the buffer interface
    Complete output from command python setup.py egg_info:
    running egg_info

creating pip-egg-info/python_daemon.egg-info

Traceback (most recent call last):

  File "<string>", line 17, in <module>

  File "/Users/alex_gaynor/.virtualenvs/tempenv-4b7d34306d0a/build/python-daemon/setup.py", line 62, in <module>

    u"Topic :: Software Development :: Libraries :: Python Modules",

  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/core.py", line 152, in setup

    dist.run_commands()

  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/dist.py", line 953, in run_commands

    self.run_command(cmd)

  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/dist.py", line 972, in run_command

    cmd_obj.run()

  File "<string>", line 14, in replacement_run

  File "/Users/alex_gaynor/.virtualenvs/tempenv-4b7d34306d0a/lib/python2.7/site-packages/setuptools/command/egg_info.py", line 368, in write_requirements

    _write_requirements(data, dist.install_requires)

  File "/Users/alex_gaynor/.virtualenvs/tempenv-4b7d34306d0a/lib/python2.7/site-packages/setuptools/command/egg_info.py", line 363, in _write_requirements

    stream.writelines(lines)

TypeError: 'unicode' does not have the buffer interface

----------------------------------------
Cleaning up...
Command python setup.py egg_info failed with error code 1 in /Users/alex_gaynor/.virtualenvs/tempenv-4b7d34306d0a/build/python-daemon
Storing debug log for failure in /Users/alex_gaynor/.pip/pip.log