`pip` managed install is broken.

[nejucomo]

I used to be able to successfully run pip install allmydata-tahoe in a fresh virtualenv, but this now fails as of 1.10.0.

It appears related to Nevow. I'm hopping on #twisted to ask for advice.

$ mkdir ~/tmp/tahoe-install-test

$ cd !$
cd ~/tmp/tahoe-install-test

$ virtualenv .
Using real prefix '/usr/local/bin/../stow/Python-2.7.3-setuptools-0.6c11'
New python executable in ./bin/python
Installing setuptools............done.
Installing pip...............done.

$ source ./bin/activate
(tahoe-install-test)
$ pip install allmydata-tahoe
Downloading/unpacking allmydata-tahoe
  Downloading allmydata-tahoe-1.10.0.tar.gz (1.4MB): 1.4MB downloaded
  Running setup.py egg_info for package allmydata-tahoe
    Not found: tahoe-deps
    Not found: ../tahoe-deps

    Installed /home/n/tmp/tahoe-install-test/build/allmydata-tahoe/Twisted-13.0.0-py2.7-linux-x86_64.egg
    Searching for zope.interface==3.6.0,==3.6.1,==3.6.2,>=3.6.5
    Reading http://pypi.python.org/simple/zope.interface/
    Best match: zope.interface 4.0.5
    Downloading https://tahoe-lafs.org/source/tahoe-lafs/deps/tahoe-lafs-dep-sdists/zope.interface-4.0.5.zip
    Processing zope.interface-4.0.5.zip
    Running zope.interface-4.0.5/setup.py -q bdist_egg --dist-dir /home/n/tmp/easy_install-B8abnY/zope.interface-4.0.5/egg-dist-tmp-7VsGgq
    warning: no previously-included files matching '*.dll' found anywhere in distribution
    warning: no previously-included files matching '*.pyc' found anywhere in distribution
    warning: no previously-included files matching '*.pyo' found anywhere in distribution
    warning: no previously-included files matching '*.so' found anywhere in distribution

    Installed /home/n/tmp/tahoe-install-test/build/allmydata-tahoe/zope.interface-4.0.5-py2.7-linux-x86_64.egg

    package init file 'src/allmydata/web/static/__init__.py' not found (or not a regular file)
    package init file 'src/allmydata/web/static/css/__init__.py' not found (or not a regular file)
    warning: no previously-included files matching '*~' found anywhere in distribution
    warning: no previously-included files matching '*.pyc' found anywhere in distribution
Requirement already satisfied (use --upgrade to upgrade): setuptools>=0.6c6 in ./lib/python2.7/site-packages/setuptools-0.6c11-py2.7.egg (from allmydata-tahoe)
Downloading/unpacking zfec>=1.1.0 (from allmydata-tahoe)
  Downloading zfec-1.4.24.tar.gz (175kB): 175kB downloaded
  Running setup.py egg_info for package zfec

Downloading/unpacking simplejson>=1.4 (from allmydata-tahoe)
  Downloading simplejson-3.3.0.tar.gz (67kB): 67kB downloaded
  Running setup.py egg_info for package simplejson

Downloading/unpacking zope.interface==3.6.0,==3.6.1,==3.6.2,>=3.6.5 (from allmydata-tahoe)
  Downloading zope.interface-4.0.5.zip (173kB): 173kB downloaded
  Running setup.py egg_info for package zope.interface

    warning: no previously-included files matching '*.dll' found anywhere in distribution
    warning: no previously-included files matching '*.pyc' found anywhere in distribution
    warning: no previously-included files matching '*.pyo' found anywhere in distribution
    warning: no previously-included files matching '*.so' found anywhere in distribution
Downloading/unpacking Twisted>=11.0.0 (from allmydata-tahoe)
  Downloading Twisted-13.1.0.tar.bz2 (2.7MB): 2.7MB downloaded
  Running setup.py egg_info for package Twisted

Downloading/unpacking foolscap>=0.6.3 (from allmydata-tahoe)
  Downloading foolscap-0.6.4.tar.gz (479kB): 479kB downloaded
  Running setup.py egg_info for package foolscap

Downloading/unpacking pyOpenSSL (from allmydata-tahoe)
  Downloading pyOpenSSL-0.13.tar.gz (250kB): 250kB downloaded
  Running setup.py egg_info for package pyOpenSSL

    warning: no previously-included files matching '*.pyc' found anywhere in distribution
Downloading/unpacking Nevow>=0.6.0 (from allmydata-tahoe)
  Downloading Nevow-0.10.0.tar.gz (518kB): 518kB downloaded
  Running setup.py egg_info for package Nevow
    Traceback (most recent call last):
      File "<string>", line 16, in <module>
      File "/home/n/tmp/tahoe-install-test/build/Nevow/setup.py", line 3, in <module>
        from nevow import __version__ as version
      File "nevow/__init__.py", line 5, in <module>
        from nevow._version import version
      File "nevow/_version.py", line 2, in <module>
        from twisted.python import versions
    ImportError: No module named twisted.python
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):

  File "<string>", line 16, in <module>

  File "/home/n/tmp/tahoe-install-test/build/Nevow/setup.py", line 3, in <module>

    from nevow import __version__ as version

  File "nevow/__init__.py", line 5, in <module>

    from nevow._version import version

  File "nevow/_version.py", line 2, in <module>

    from twisted.python import versions

ImportError: No module named twisted.python

----------------------------------------
Command python setup.py egg_info failed with error code 1 in /home/n/tmp/tahoe-install-test/build/Nevow
Storing complete log in /home/n/.pip/pip.log