Plone 4.3 AssertionError Running Buildout - plone

Question

We recently got a new Linux machine that got re-imaged from our older machine where our current plone installation resides. I am trying to run buildout on the new machine but I am getting this AssertionError on our plonetheme src product.
Installing 'buildout.dumppickedversions', 'buildout.sanitycheck'.
We have the distribution that satisfies 'buildout.dumppickedversions==0.5'.
Picked: buildout.sanitycheck = 1.0b1
Develop: '/var/db/zope/plone43/zeocluster/src/products.okctypes'
in: '/var/db/zope/plone43/zeocluster/src/products.okctypes'
/tmp/tmpVPeu_l -q develop -mxN -d /var/db/zope/plone43/zeocluster/develop-eggs/tmp4eer1vbuild
Develop: '/var/db/zope/plone43/zeocluster/src/plonetheme.ourtheme'
in: '/var/db/zope/plone43/zeocluster/src/plonetheme.ourtheme'
/tmp/tmppWGq8Z -q develop -mxN -d /var/db/zope/plone43/zeocluster/develop-eggs/tmpUl2ukSbuild
No local packages or download links found for PasteScript
Traceback (most recent call last):
File "/tmp/tmppWGq8Z", line 11, in <module>
execfile('/var/db/zope/plone43/zeocluster/src/plonetheme.ourtheme/setup.py')
File "/var/db/zope/plone43/zeocluster/src/plonetheme.ourtheme/setup.py", line 37, in <module>
paster_plugins=["ZopeSkel"],
File "/var/db/zope/plone43/Python-2.7/lib/python2.7/distutils/core.py", line 112, in setup
_setup_distribution = dist = klass(attrs)
File "/var/db/zope/plone43/buildout-cache/eggs/distribute-0.6.28-py2.7.egg/setuptools/dist.py", line 221, in __init__
self.fetch_build_eggs(attrs.pop('setup_requires'))
File "/var/db/zope/plone43/buildout-cache/eggs/distribute-0.6.28-py2.7.egg/setuptools/dist.py", line 245, in fetch_build_eggs
parse_requirements(requires), installer=self.fetch_build_egg
File "/var/db/zope/plone43/buildout-cache/eggs/distribute-0.6.28-py2.7.egg/pkg_resources.py", line 580, in resolve
dist = best[req.key] = env.best_match(req, self, installer)
File "/var/db/zope/plone43/buildout-cache/eggs/distribute-0.6.28-py2.7.egg/pkg_resources.py", line 825, in best_match
return self.obtain(req, installer) # try and download/install
File "/var/db/zope/plone43/buildout-cache/eggs/distribute-0.6.28-py2.7.egg/pkg_resources.py", line 837, in obtain
return installer(requirement)
File "/var/db/zope/plone43/buildout-cache/eggs/distribute-0.6.28-py2.7.egg/setuptools/dist.py", line 294, in fetch_build_egg
return cmd.easy_install(req)
File "/var/db/zope/plone43/buildout-cache/eggs/distribute-0.6.28-py2.7.egg/setuptools/command/easy_install.py", line 592, in easy_install
raise DistutilsError(msg)
distutils.errors.DistutilsError: Could not find suitable distribution for Requirement.parse('PasteScript')
While:
Installing.
Processing develop directory '/var/db/zope/plone43/zeocluster/src/plonetheme.ourtheme'.
An internal error occurred due to a bug in either zc.buildout or in a
recipe being used:
Traceback (most recent call last):
File "/var/db/zope/plone43/buildout-cache/eggs/zc.buildout-1.7.1-py2.7.egg/zc/buildout/buildout.py", line 1866, in main
getattr(buildout, command)(args)
File "/var/db/zope/plone43/buildout-cache/eggs/zc.buildout-1.7.1-py2.7.egg/zc/buildout/buildout.py", line 487, in install
installed_develop_eggs = self._develop()
File "/var/db/zope/plone43/buildout-cache/eggs/zc.buildout-1.7.1-py2.7.egg/zc/buildout/buildout.py", line 727, in _develop
zc.buildout.easy_install.develop(setup, dest)
File "/var/db/zope/plone43/buildout-cache/eggs/zc.buildout-1.7.1-py2.7.egg/zc/buildout/easy_install.py", line 1184, in develop
*args) == 0
AssertionError
*************** PICKED VERSIONS ****************
[versions]
*************** /PICKED VERSIONS ***************
Our Product's init.py script contains the following:
# See http://peak.telecommunity.com/DevCenter/setuptools#namespace-packages
try:
__import__('pkg_resources').declare_namespace(__name__)
except ImportError:
from pkgutil import extend_path
__path__ = extend_path(__path__, __name__)
I've seen a similar error reported here but the answer provided does not apply to our case. We have other products in src but this is the only one causing problems.
Can someone please help us with this error?

Answer 1

Check the setup.py file in your theme package. You'll likely find:
# The next two lines may be deleted after you no longer need
# addcontent support from paster and before you distribute
# your package.
setup_requires=["PasteScript"],
paster_plugins = ["ZopeSkel"],
Remove those lines. They are included in the generated template for your package so that you may use Zopeskel local commands to add new functionality. You don't need it after development, and it's often a source of problems later.
The alternative solution, as mentioned in the comments, is to make sure you have the right egg in your local buildout cache. But why have old development packages sitting around on a live site?