conflict version setuptools install

[artb1sh]

$ sudo -u plone_buildout python2.7 bootstrap.py
Downloading https://pypi.python.org/packages/source/s/setuptools/setuptools-7.0.zip
Extracting in /tmp/tmp5CoMkQ
Now working in /tmp/tmp5CoMkQ/setuptools-7.0
Building a Setuptools egg in /tmp/tmpe9gPFm
/tmp/tmpe9gPFm/setuptools-7.0-py2.7.egg
Creating directory '/usr/local/onegov.municipality/bin'.
Creating directory '/usr/local/onegov.municipality/parts'.
Creating directory '/usr/local/onegov.municipality/eggs'.
Creating directory '/usr/local/onegov.municipality/develop-eggs'.
Generated script '/usr/local/onegov.municipality/bin/buildout'.

$ sudo -u plone_buildout bin/buildout -c development.cfg
Getting distribution for 'mr.developer==1.21'.
Got mr.developer 1.21.
Getting distribution for 'zc.buildout==1.7.1'.
Got zc.buildout 1.7.1.
Getting distribution for 'setuptools==0.6c11'.
While:
Installing.
Loading extensions.
Getting distribution for 'setuptools==0.6c11'.

An internal error occurred due to a bug in either zc.buildout or in a
recipe being used:
Traceback (most recent call last):
File "/usr/local/onegov.municipality/eggs/zc.buildout-2.2.5-py2.7.egg/zc/buildout/buildout.py", line 1946, in main
getattr(buildout, command)(args)
File "/usr/local/onegov.municipality/eggs/zc.buildout-2.2.5-py2.7.egg/zc/buildout/buildout.py", line 467, in install
self._load_extensions()
File "/usr/local/onegov.municipality/eggs/zc.buildout-2.2.5-py2.7.egg/zc/buildout/buildout.py", line 995, in _load_extensions
newest=self.newest, allow_hosts=self._allow_hosts)
File "/usr/local/onegov.municipality/eggs/zc.buildout-2.2.5-py2.7.egg/zc/buildout/easy_install.py", line 844, in install
return installer.install(specs, working_set)
File "/usr/local/onegov.municipality/eggs/zc.buildout-2.2.5-py2.7.egg/zc/buildout/easy_install.py", line 681, in install
for_buildout_run=for_buildout_run):
File "/usr/local/onegov.municipality/eggs/zc.buildout-2.2.5-py2.7.egg/zc/buildout/easy_install.py", line 545, in _get_dist
dist = self._env.best_match(requirement, ws)
File "build/bdist.linux-x86_64/egg/pkg_resources.py", line 863, in best_match
dist = working_set.find(req)
File "build/bdist.linux-x86_64/egg/pkg_resources.py", line 492, in find
raise VersionConflict(dist, req)
VersionConflict: (setuptools 7.0 (/usr/local/onegov.municipality/eggs/setuptools-7.0-py2.7.egg), Requirement.parse('setuptools==0.6c11'))

[href]

Can you try adding the following to buildout.cfg, right below the [buildout] section and tell me if it helps?

[versions]
zc.buildout = 2.2.3
setuptools = 7.0