pyobjc 2.4 install error

gistfile1.txt

running install_lib

Traceback (most recent call last):

  File "<string>", line 1, in <module>

  File "/Users/fred/.virtualenvs/upshot/build/pyobjc-core/setup.py", line 492, in <module>

    zip_safe = False,

  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 "/Users/fred/.virtualenvs/upshot/lib/python2.7/site-packages/setuptools/command/install.py", line 61, in run

    return orig.install.run(self)

  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/command/install.py", line 585, in run

    self.run_command(cmd_name)

  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/cmd.py", line 326, in run_command

    self.distribution.run_command(command)

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

    cmd_obj.run()

  File "/Users/fred/.virtualenvs/upshot/lib/python2.7/site-packages/setuptools/command/install_lib.py", line 11, in run

    outfiles = self.install()

  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/command/install_lib.py", line 115, in install

    outfiles = self.copy_tree(self.build_dir, self.install_dir)

  File "/Users/fred/.virtualenvs/upshot/lib/python2.7/site-packages/setuptools/command/install_lib.py", line 88, in copy_tree

    exclude = self.get_exclusions()

  File "/Users/fred/.virtualenvs/upshot/build/pyobjc-core/setup.py", line 271, in get_exclusions

    for fn in install_lib._install_lib.get_outputs(self):

AttributeError: 'module' object has no attribute '_install_lib'

----------------------------------------
Cleaning up...
Command /Users/fred/.virtualenvs/upshot/bin/python -c "import setuptools, tokenize;__file__='/Users/fred/.virtualenvs/upshot/build/pyobjc-core/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /var/folders/8t/h66tn3rn3nl253h3cmct4s2r0000gq/T/pip-Kiz6_f-record/install-record.txt --single-version-externally-managed --compile --install-headers /Users/fred/.virtualenvs/upshot/include/site/python2.7 failed with error code 1 in /Users/fred/.virtualenvs/upshot/build/pyobjc-core
Storing debug log for failure in /Users/fred/.pip/pip.log