I tried the "pip" way of installing openpyxl, but that failed with an exception as shown in the attached log file.
Not 100% sure if this bug report belongs here or to the pip project but since it seems the problem is openpyxl's tar file, I thought it should be solved here?
I was able to work around the issue downloading the tar file manually, untaring it and running
python setup.py install
from the untared directory.