I\'ve been looking for an answer to this issue but I couldn\'t find it, so here it is.
I\'m trying to install Uniconvertor with a setup.py file into a MacOS X Lion (
I got this error due to running an outdated version of pip. I ran pip install --upgrade pip and the error went away. Something to consider if you already have xcode command line tools installed and are still getting the error.
pip install --upgrade pip