As of 9206e78231a6821631c3e1dd28bace05dab0ca59, rpy2 can only be installed by either calling setup.py directly or installing it with pip.
easy_install-2.7 or declaring it as a dependency from another package using setuptools with Python 2.7 fails to expose the r_utils library to the linker.
/usr/bin/ld: cannot find -lr_utils collect2: ld returned 1 exit status error: Setup script exited with error: command 'gcc' failed with exit status 1
With setuptools and easy_install-2.7, it also fails to check/install the dependencies 'six' and 'singledispatch'. These dependencies are checked and installed correctly when using pip-2.7.
Python 2.7.3 R version 3.2.2 (2015-08-14) -- "Fire Safety" Ubuntu Precise 64bit with https://launchpad.net/~marutter/+archive/ubuntu/rrutter rpy2 2.7.0 installed from pypi