'UserWarning: Unbuilt egg for setuptools' on Lucid

[davidsarah]

​http://tahoe-lafs.org/buildbot/builders/lucid-amd64/builds/31/steps/test/logs/stdio :

[FAIL]: allmydata.test.test_runner.BinTahoe.test_version_no_noise

Traceback (most recent call last):
  File "/home/buildslave/tahoe-buildslave/lucid-amd64/build/src/allmydata/test/test_runner.py", line 160, in _cb
    self.failUnlessEqual(err, "", str(res))
twisted.trial.unittest.FailTest: ('allmydata-tahoe: 1.8.0-r4766, foolscap: 0.5.1, pycryptopp: 0.5.25, zfec: 1.4.7, Twisted: 10.1.0, Nevow: 0.10.0, zope.interface: 3.5.3, python: 2.6.5, platform: Linux-Ubuntu_10.04-x86_64-64bit_ELF, sqlite: 3.6.22, simplejson: 2.1.1, distribute: 0.6.10, argparse: 1.1, pycrypto: 2.3, pyOpenSSL: 0.10, pyutil: 1.7.12, zbase32: 1.1.2, setuptools: 0.6, pyasn1: 0.0.11a, pysqlite: 2.4.1\n', '/home/buildslave/tahoe-buildslave/lucid-amd64/build/support/bin/tahoe:6: UserWarning: Unbuilt egg for setuptools [unknown version] (/usr/lib/python2.6/dist-packages)\n  from pkg_resources import load_entry_point\n', 0)
not equal:
a = '/home/buildslave/tahoe-buildslave/lucid-amd64/build/support/bin/tahoe:6: UserWarning: Unbuilt egg for setuptools [unknown version] (/usr/lib/python2.6/dist-packages)\n  from pkg_resources import load_entry_point\n'
b = ''

===============================================================================
[FAIL]: allmydata.test.test_runner.RunNode.test_client_no_noise

Traceback (most recent call last):
  File "/home/buildslave/tahoe-buildslave/lucid-amd64/build/src/allmydata/test/test_runner.py", line 442, in _cb2
    self.failUnlessEqual(err, "", errstr)
twisted.trial.unittest.FailTest: cc=0, OUT: '', ERR: '/home/buildslave/tahoe-buildslave/lucid-amd64/build/support/bin/tahoe:6: UserWarning: Unbuilt egg for setuptools [unknown version] (/usr/lib/python2.6/dist-packages)
  from pkg_resources import load_entry_point
'
not equal:
a = '/home/buildslave/tahoe-buildslave/lucid-amd64/build/support/bin/tahoe:6: UserWarning: Unbuilt egg for setuptools [unknown version] (/usr/lib/python2.6/dist-packages)\n  from pkg_resources import load_entry_point\n'
b = ''