joyent/node — pull request #4596 by cdent (2013-01-14 22:25:05+00:00)
Title: Update tools/install.py

Make tools/install.py work with python 2.5

2.5 is still fairly widespread and does not include a json lib as
standard. Most python folk will have simplejson if they are in that
boat.

In general it seems a bit tricky to solve this perfectly...