It may happen that your system doesn’t have libraries needed to build the bzip2 support into SIMO’s Python. In that case the buildout installation of SIMO will terminate at Twisted installation with the message:
Error: Couldn't install Twisted 8.2.0
(or whatever the Twisted version might be when you’re installing). A fex lines above you’ll see something like this:
error: Not a recognized archive type: /tmp/tmpV4NoSrget_dist/Twisted-8.2.0.tar.bz2
You need to install development version of bzip2 and rebuild the Python used by SIMO. On Ubuntu:
sudo apt-get install libbz2-dev
rm -rf parts/python-2.6
python build_env.py
and everything should finish cleanly.
On systems using the rpm based package management, try:
sudo yum install bzip2-devel
for the first step.