Unable to install ROS Hydra on Raspberry Pi 2

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I'm trying to install ROS Hydro on my Raspberry Pi2 using the latest version of Raspbian.
These are the instructions that I'm following: http://wiki.ros.org/ROSberryPi/Settin...

When I get down to sudo apt-get install python-rosdep python-rosinstall-generator build-essential I start getting a bunch of errors and I can't figure out what to do. I'm fairly new to Linux so most of this goes right over my head.

Here's what happens when I run that line of code:

Reading package lists... Done
Building dependency tree
Reading state information... Done
build-essential is already the newest version.
Some packages could not be installed. This may mean that you have
request an impossible situation or if you are using the unstable distribution that some requrieed packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 python-rosdep :
                      Depends : python:any (>= 2.7.1-0ubuntu2) but it is not installable
                      Depends: python-catkin-pkg but it is not going to be installed
                      Depends: python-rospkg (>= 1.0.34) but it is not going to be installed
                      Depends: python-rosdistro (>= 0.4.0) but it is not going to be installed
 python-rosinstall-generator :
                      Depends: python:any (>= 2.7.1-0ubuntu2) but it is not installable
                      Depends: python-catkin-pkg (>= 0.1.28) but it is not going to be installed
                      Depends: python-rosdistro (>= 0.3.4) but it is not going to be installed
                      Depends: python-rospkg but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

Any help is appreciated, thanks!!