Error after adding plone.app.dexterity to Plone 4.3 buildout - plone

Question

I've used https://github.com/plone/plonedev.vagrant to set up a Plone 4.3 development environment on Windows. I've been trying to add Dexterity support to my installation, but have run into problems.
The steps I have taken are as follows:
Added zopeskel.dexterity and plone.app.dexterity [relations, grok] to the [eggs] section of my buildout.cfg
Added ZopeSkel <= 2.99 to the [versions] section of buildout.cfg
I re-run buildout and try to start the server in foreground mode, but get this traceback:
vagrant#precise32:~$ ./runbin.sh plonectl fg
instance: Traceback (most recent call last):
File "/home/vagrant/Plone/zinstance/bin/instance", line 290, in <module>
import plone.recipe.zope2instance.ctl
File "/home/vagrant/Plone/buildout-cache/eggs/plone.recipe.zope2instance-4.2.9-py2.7.egg/plone/recipe/__init__.py", line 1, in <module>
__import__('pkg_resources').declare_namespace(__name__)
File "/home/vagrant/Plone/buildout-cache/eggs/distribute-0.6.28-py2.7.egg/pkg_resources.py", line 2835, in <module>
add_activation_listener(lambda dist: dist.activate())
File "/home/vagrant/Plone/buildout-cache/eggs/distribute-0.6.28-py2.7.egg/pkg_resources.py", line 704, in subscribe
callback(dist)
File "/home/vagrant/Plone/buildout-cache/eggs/distribute-0.6.28-py2.7.egg/pkg_resources.py", line 2835, in <lambda>
add_activation_listener(lambda dist: dist.activate())
File "/home/vagrant/Plone/buildout-cache/eggs/distribute-0.6.28-py2.7.egg/pkg_resources.py", line 2262, in activate
map(declare_namespace, self._get_metadata('namespace_packages.txt'))
File "/home/vagrant/Plone/buildout-cache/eggs/distribute-0.6.28-py2.7.egg/pkg_resources.py", line 1847, in declare_namespace
_handle_ns(packageName, path_item)
File "/home/vagrant/Plone/buildout-cache/eggs/distribute-0.6.28-py2.7.egg/pkg_resources.py", line 1817, in _handle_ns
loader.load_module(packageName); module.__path__ = path
File "/usr/lib/python2.7/pkgutil.py", line 246, in load_module
mod = imp.load_module(fullname, self.file, self.filename, self.etc)
File "/home/vagrant/Plone/buildout-cache/eggs/ZopeSkel-2.21.2-py2.7.egg/zopeskel/__init__.py", line 2, in <module>
from zopeskel.basic_namespace import BasicNamespace
File "/home/vagrant/Plone/buildout-cache/eggs/ZopeSkel-2.21.2-py2.7.egg/zopeskel/basic_namespace.py", line 2, in <module>
from zopeskel.vars import var, DottedVar, StringVar, BooleanVar, TextVar
File "/home/vagrant/Plone/buildout-cache/eggs/ZopeSkel-2.21.2-py2.7.egg/zopeskel/vars.py", line 2, in <module>
from paste.script.templates import var as base_var
ImportError: No module named script.templates
EDIT: I forgot to mention that buildout.cfg extends base.cfg, which contains the following:
[zopeskel]
# installs paster and Zopeskel
recipe = zc.recipe.egg
eggs =
ZopeSkel
Paste
PasteDeploy
PasteScript
${buildout:eggs}
I just tried explicitly adding PasteScript to the [eggs] section in buildout.cfg. After running buildout and attempting to start the server, I get a different traceback:
vagrant#precise32:~$ ./runbin.sh plonectl fg
instance: Traceback (most recent call last):
File "/home/vagrant/Plone/zinstance/bin/instance", line 291, in <module>
import plone.recipe.zope2instance.ctl
File "/home/vagrant/Plone/buildout-cache/eggs/plone.recipe.zope2instance-4.2.9-py2.7.egg/plone/recipe/__init__.py", line 1, in <module>
__import__('pkg_resources').declare_namespace(__name__)
File "/home/vagrant/Plone/buildout-cache/eggs/distribute-0.6.28-py2.7.egg/pkg_resources.py", line 2835, in <module>
add_activation_listener(lambda dist: dist.activate())
File "/home/vagrant/Plone/buildout-cache/eggs/distribute-0.6.28-py2.7.egg/pkg_resources.py", line 704, in subscribe
callback(dist)
File "/home/vagrant/Plone/buildout-cache/eggs/distribute-0.6.28-py2.7.egg/pkg_resources.py", line 2835, in <lambda>
add_activation_listener(lambda dist: dist.activate())
File "/home/vagrant/Plone/buildout-cache/eggs/distribute-0.6.28-py2.7.egg/pkg_resources.py", line 2262, in activate
map(declare_namespace, self._get_metadata('namespace_packages.txt'))
File "/home/vagrant/Plone/buildout-cache/eggs/distribute-0.6.28-py2.7.egg/pkg_resources.py", line 1847, in declare_namespace
_handle_ns(packageName, path_item)
File "/home/vagrant/Plone/buildout-cache/eggs/distribute-0.6.28-py2.7.egg/pkg_resources.py", line 1817, in _handle_ns
loader.load_module(packageName); module.__path__ = path
File "/usr/lib/python2.7/pkgutil.py", line 246, in load_module
mod = imp.load_module(fullname, self.file, self.filename, self.etc)
File "/home/vagrant/Plone/buildout-cache/eggs/ZopeSkel-2.21.2-py2.7.egg/zopeskel/__init__.py", line 2, in <module>
from zopeskel.basic_namespace import BasicNamespace
File "/home/vagrant/Plone/buildout-cache/eggs/ZopeSkel-2.21.2-py2.7.egg/zopeskel/basic_namespace.py", line 2, in <module>
from zopeskel.vars import var, DottedVar, StringVar, BooleanVar, TextVar
File "/home/vagrant/Plone/buildout-cache/eggs/ZopeSkel-2.21.2-py2.7.egg/zopeskel/vars.py", line 2, in <module>
from paste.script.templates import var as base_var
File "/vagrant/plone/src/hello.world/PasteScript-1.7.5-py2.7.egg/paste/script/templates.py", line 9, in <module>
from paste.util.template import paste_script_template_renderer
ImportError: No module named util.template
Is this an issue with my Python path? I ran bin/zopepy then did import paste;print paste.__file__ and the output is:
/vagrant/plone/src/hello.world/PasteScript-1.7.5-py2.7.egg/paste/__init__.pyc
The Paste-1.7.5.1 egg directory does contain a paste/util/template.py file, but it looks like the interpreter can't find it.

Answer 1

You don't need to add Dexterity to Plone 4.3, it's already included:
http://plone.org/products/plone/releases/4.3

Answer 2

As documented on the zopeskel.dexterity PyPI page you need to include the PasteScript egg too; the traceback shows you it is missing:
[zopeskel]
recipe = zc.recipe.egg
eggs =
ZopeSkel < 3.0dev
Paste
PasteDeploy
PasteScript
zopeskel.dexterity
${buildout:eggs}

Answer 3

You may be doing a lot more work than you need to do. The plonedev.vagrant kit comes with zopeskel and zopeskel.dexterity preinstalled. Take a look at this transcript:
steve#lumpy:~/plonedev_vagrant$ vagrant up
[default] Importing base box 'precise32'...
...
steve#lumpy:~/plonedev_vagrant$ vagrant ssh
Welcome to Ubuntu 12.04.2 LTS (GNU/Linux 3.2.0-48-generic i686)
...
vagrant#vagrant-ubuntu-precise-32:~/Plone/zinstance$ ll bin
...
-rwxr-xr-x 1 vagrant vagrant 20023 Jul 16 01:41 zopeskel*
...
vagrant#vagrant-ubuntu-precise-32:~/Plone/zinstance$ cd src
...
vagrant#vagrant-ubuntu-precise-32:~/Plone/zinstance/src$ ~/Plone/zinstance/bin/zopeskel dexterity
dexterity: A Dexterity-based product
...
There's one bit of magic in this: due to the way the plonedev.vagrant kit symbolically links the src directory, you can't cd to it and use "../bin/zopeskel". That's why the "~/Plone/zinstance/bin/zopeskel dexterity" command is used.
We should either document that oddity or find a way to avoid it.