How to install CKAN DataPkg from source

#!/bin/bash    
# How to install datapkg from source
# Tested on Ubuntu 10.04
# References: http://knowledgeforge.net/ckan/doc/datapkg/install.html
 
# Install prerequisites
sudo apt-get install mercurial python-virtualenv python-setuptools
 
# Download source
hg clone http://knowledgeforge.net/ckan/datapkg
 
# Set up virtual environment
virtualenv your_virtual_env
. your_virtual_env/bin/activate
 
# Install datapkg
cd datapkg
python setup.py develop
 
# Test datapkg
datapkg --version
datapkg list ckan://