[virtualenv + pip install pybfd]: error: option --single-version-externally-managed not recognized

[ret5et]

:~/src$ virtualenv  lalal
Running virtualenv with interpreter /home/ret/src/test/bin/python2
Using real prefix '/usr'
New python executable in lalal/bin/python2
Also creating executable in lalal/bin/python
Installing setuptools, pip...done.
ret@witch:~/src$ cd lalal/
ret@witch:~/src/lalal$ source bin/activate
(lalal)ret@witch:~/src/lalal$ pip install pybfd
Downloading/unpacking pybfd
  Downloading pybfd-0.1.1.tar.gz (181kB): 181kB downloaded
  Running setup.py (path:/tmp/pip-build-ctdaZV/pybfd/setup.py) egg_info for package pybfd

Installing collected packages: pybfd
  Running setup.py install for pybfd
    usage: -c [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts] ...]
       or: -c --help [cmd1 cmd2 ...]
       or: -c --help-commands
       or: -c cmd --help

    error: option --single-version-externally-managed not recognized
    Complete output from command /home/ret/src/lalal/bin/python2 -c "import setuptools, tokenize;__file__='/tmp/pip-build-ctdaZV/pybfd/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-vNJ6ck-record/install-record.txt --single-version-externally-managed --compile --install-headers /home/ret/src/lalal/include/site/python2.7:
    usage: -c [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts] ...]

   or: -c --help [cmd1 cmd2 ...]

   or: -c --help-commands

   or: -c cmd --help



error: option --single-version-externally-managed not recognized

----------------------------------------
Cleaning up...
Command /home/ret/src/lalal/bin/python2 -c "import setuptools, tokenize;__file__='/tmp/pip-build-ctdaZV/pybfd/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-vNJ6ck-record/install-record.txt --single-version-externally-managed --compile --install-headers /home/ret/src/lalal/include/site/python2.7 failed with error code 1 in /tmp/pip-build-ctdaZV/pybfd
Storing debug log for failure in /home/ret/.pip/pip.log

:(

[abforce]

pip install --egg pybfd

[rlipscombe]

While this works, --egg is deprecated. Is there a more up-to-date solution to this problem?