asv installation traceback

traceback

danielallan@MacBook:asv$source activate clean
pdiscarding /Users/danielallan/anaconda/bin from PATH
ythoprepending /Users/danielallan/anaconda/envs/clean/bin to PATH
n (clean)danielallan@MacBook:asv$python setup.py develop
Downloading https://pypi.python.org/packages/source/s/setuptools/setuptools-2.1.tar.gz
Extracting in /var/folders/rz/1p7tmbmj2t5fbfv2wjhvwcsh0000gn/T/tmpmPOail
Now working in /var/folders/rz/1p7tmbmj2t5fbfv2wjhvwcsh0000gn/T/tmpmPOail/setuptools-2.1
Building a Setuptools egg in /Users/danielallan/Documents/Repos/asv
/Users/danielallan/Documents/Repos/asv/setuptools-2.1-py2.7.egg
running develop
running egg_info
creating asv.egg-info
writing requirements to asv.egg-info/requires.txt
writing asv.egg-info/PKG-INFO
writing top-level names to asv.egg-info/top_level.txt
writing dependency_links to asv.egg-info/dependency_links.txt
writing entry points to asv.egg-info/entry_points.txt
writing manifest file 'asv.egg-info/SOURCES.txt'
reading manifest file 'asv.egg-info/SOURCES.txt'
writing manifest file 'asv.egg-info/SOURCES.txt'
running build_ext
Processing setuptools-2.1-py2.7.egg
Copying setuptools-2.1-py2.7.egg to /Users/danielallan/anaconda/envs/clean/lib/python2.7/site-packages
Adding setuptools 2.1 to easy-install.pth file
Installing easy_install script to /Users/danielallan/anaconda/envs/clean/bin
Installing easy_install-2.7 script to /Users/danielallan/anaconda/envs/clean/bin

Installed /Users/danielallan/anaconda/envs/clean/lib/python2.7/site-packages/setuptools-2.1-py2.7.egg
Creating /Users/danielallan/anaconda/envs/clean/lib/python2.7/site-packages/asv.egg-link (link to .)
Adding asv 0.1 to easy-install.pth file
Installing asv script to /Users/danielallan/anaconda/envs/clean/bin

Installed /Users/danielallan/Documents/Repos/asv
Processing dependencies for asv==0.1
Searching for virtualenv>=1.10,!=1.11.0
Reading https://pypi.python.org/simple/virtualenv/
Download error on https://pypi.python.org/simple/virtualenv/: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:581) -- Some packages may not be found!
Couldn't find index page for 'virtualenv' (maybe misspelled?)
Scanning index of all packages (this may take a while)
Reading https://pypi.python.org/simple/
Download error on https://pypi.python.org/simple/: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:581) -- Some packages may not be found!
No local packages or download links found for virtualenv>=1.10,!=1.11.0
error: Could not find suitable distribution for Requirement.parse('virtualenv>=1.10,!=1.11.0')