boost not found in electric on Linuxmint 9(based on lucid 10.04)

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I'm running the installations and tutorial for building packages in electric (http://www.ros.org/wiki/ROS/Tutorials/BuildingPackages) When I run the command:

rosdep install turtlesim

I get the following result:

Invalid identifier found [lucid] when processing rosdep boost.  
{{{
{'lucid': {'apt': {'packages': ['libboost1.40-all-dev']}}, 'maverick': {'apt': {'packages': ['libboost1.42-all-dev']}}, 'natty': {'apt': {'packages': ['libboost1.42-all-dev']}}}
}}}

Failed to find rosdep boost for package turtlesim on OS:ubuntu version:10.04
rosdep install ERROR:
failed to install boost

I've looked in synaptic and I have libboost1.40-all-dev installed.

I've tried the following with the following results:

1. I've tried installing the newest version of LinuxMint in a virtual machine, but I get the same error.
2. Installing Ubuntu 10.04 in a virtual machine. I don't get this error (however, I can't run stage because it won't work with the virtual video card).
3. Installing ROS on a Mac, this won't work because I get a whole host of problems cropping up such as not being able to py26-setuptools, or easy_install because they are "not found" when I try sudo port install py26-setuptools)

This is driving me completely nuts. Does anyone have any idea what I can try?