Comment 2 for bug 1660508

If I remember correctly, I get the errors since I updated python's "setuptools" to work on certbot (development tools), similar to what is demonstrated at https://community.letsencrypt.org/t/cant-install-certbot-on-debian-jessy-unmet-dependencies/19417.

Pip now shows these packages and versions:

pip list
adium-theme-ubuntu (0.3.4)
alabaster (0.7.7)
attrs (15.2.0)
Babel (1.3)
beautifulsoup4 (4.4.1)
blinker (1.3)
ccsm (0.9.12.2)
chardet (2.3.0)
command-not-found (0.3)
compizconfig-python (0.9.12.2)
ConfigArgParse (0.11.0)
configobj (5.0.6)
cryptography (1.2.3)
debtags (2.0)
defer (1.0.6)
dirspec (13.10)
dnspython (1.12.0)
docutils (0.12)
duplicity (0.7.6)
enum34 (1.1.2)
html5lib (0.999)
httplib2 (0.9.1)
idna (2.0)
ipaddr (2.1.11)
ipaddress (1.0.16)
Jinja2 (2.8)
keyring (7.3)
launchpadlib (1.10.3)
lazr.restfulclient (0.13.4)
lazr.uri (1.0.3)
libvirt-python (1.3.1)
lockfile (0.12.2)
lxml (3.5.0)
MarkupSafe (0.23)
ndg-httpsclient (0.4.0)
netifaces (0.10.4)
numpy (1.11.0)
oauth (1.0.1)
oauthlib (1.0.3)
oneconf (0.3.9)
PAM (0.4.2)
parsedatetime (2.1)
pexpect (4.0.1)
Pillow (3.1.2)
pip (9.0.1)
piston-mini-client (0.7.5)
ptyprocess (0.5)
pyasn1 (0.1.9)
pyasn1-modules (0.0.7)
pycrypto (2.6.1)
pycups (1.9.73)
pycurl (7.43.0)
Pygments (2.1)
pygobject (3.20.0)
PyJWT (1.3.0)
pyOpenSSL (0.15.1)
pyRFC3339 (1.0)
pyserial (3.0.1)
pysmbc (1.0.15.5)
python-apt (1.1.0b1)
python-debian (0.1.27)
pytz (2014.10)
pyxdg (0.25)
reportlab (3.3.0)
requests (2.9.1)
roman (2.0.0)
SecretStorage (2.1.3)
service-identity (16.0.0)
setuptools (18.1)
setuptools-git (1.1)
setuptools-scm (1.10.1)
simplejson (3.8.1)
six (1.10.0)
software-center-aptd-plugins (0.0.0)
Sphinx (1.3.6)
sphinx-rtd-theme (0.1.9)
Twisted (16.0.0)
unity-lens-photos (1.0)
urllib3 (1.13.1)
wadllib (1.3.2)
youtube-dl (2016.2.22)
zope.component (4.3.0)
zope.event (4.2.0)
zope.interface (4.1.3)