I found the issue

https://github.com/pypa/pip/issues/3028

And just for the record.
(control) N:\zope\control>Scripts\pip.exe -V
pip 8.1.2 from n:\zope\control\lib\site-packages (python 2.7)


(control-emisiones3) N:\zope\control>Scripts\pip.exe list
AccessControl (2.13.13)
Acquisition (2.13.9)
DateTime (2.12.8)
DocumentTemplate (2.13.2)
docutils (0.12)
ExtensionClass (2.13.2)
initgroups (2.13.0)
Jinja2 (2.7.3)
MarkupSafe (0.23)
mechanize (0.2.5)
Missing (2.13.1)
mr.developer (1.33)
MultiMapping (2.13.0)
nt-svcutils (2.13.0)
Paste (1.7.5.1)
PasteDeploy (1.3.4)
PasteScript (1.7.5)
Persistence (2.13.2)
pip (8.1.2)
Products.BTreeFolder2 (2.13.5)
Products.ExternalMethod (2.13.1)
Products.MailHost (2.13.2)
Products.MIMETools (2.13.0)
Products.OFSP (2.13.2)
Products.PythonScripts (2.13.2)
Products.StandardCacheManagers (2.13.1)
Products.ZCatalog (2.13.27)
Products.ZCTextIndex (2.13.5)
Pygments (2.0.2)
pytz (2015.4)
Record (2.13.0)
repoze.retry (1.2)
repoze.tm2 (1.0)
repoze.who (2.0)
RestrictedPython (3.6.0)
setuptools (18.0.1)
Sphinx (1.0.8)
tempstorage (2.12.2)
transaction (1.1.1)
wheel (0.29.0)
z3c.checkversions (0.5)
zc.buildout (2.3.1)
zc.lockfile (1.0.2)
zc.recipe.egg (2.0.3)
zc.recipe.testrunner (1.2.1)
ZConfig (2.9.3)
zdaemon (2.0.7)
zExceptions (2.13.0)
zLOG (2.11.2)
ZODB3 (3.10.5)
zope.annotation (3.5.0)
zope.broken (3.6.0)
zope.browser (1.3)
zope.browsermenu (3.9.1)
zope.browserpage (3.12.2)
zope.browserresource (3.10.3)
zope.component (3.9.5)
zope.configuration (3.7.4)
zope.container (3.11.2)
zope.contentprovider (3.7.2)
zope.contenttype (3.5.5)
zope.deferredimport (3.5.3)
zope.dottedname (3.4.6)
zope.event (3.5.2)
zope.exceptions (3.6.2)
zope.filerepresentation (3.6.1)
zope.i18n (3.7.4)
zope.i18nmessageid (3.5.3)
zope.interface (3.6.7)
zope.lifecycleevent (3.6.2)
zope.location (3.9.1)
zope.pagetemplate (3.5.2)
zope.processlifetime (1.0)
zope.proxy (3.6.1)
zope.ptresource (3.9.0)
zope.publisher (3.12.6)
zope.schema (3.7.1)
zope.security (3.7.4)
zope.sendmail (3.7.5)
zope.sequencesort (3.4.0)
zope.site (3.9.2)
zope.size (3.4.1)
zope.structuredtext (3.5.1)
zope.tal (3.5.2)
zope.tales (3.5.3)
zope.testbrowser (3.11.1)
zope.testing (3.9.7)
zope.traversing (3.13.2)
zope.viewlet (3.7.2)
Zope2 (2.13.23)
ZopeUndo (2.12.0)

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Lo bueno de vivir un dia mas
es saber que nos queda un dia menos de vida