Can't Install kobuki package on the Raspberry Pi 2 model B

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I've installed ros on the Raspberry Pi 2 model B following this tutorial.Then, I'm installing kobuki following this tutorial .But I can't install kobuki package.

I execute command "$ sudo apt-get install ros-indigo-kobuki ros-indigo-kobuki-core". Then I get a following error message.

pi@raspberrypi:~ $ sudo apt-get install ros-indigo-kobuki ros-indigo-kobuki-core
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required 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:
 ros-indigo-kobuki : Depends: ros-indigo-kobuki-auto-docking but it is not going to be installed
                     Depends: ros-indigo-kobuki-bumper2pc but it is not going to be installed
                     Depends: ros-indigo-kobuki-capabilities but it is not going to be installed
                     Depends: ros-indigo-kobuki-controller-tutorial but it is not going to be installed
                     Depends: ros-indigo-kobuki-description but it is not going to be installed
                     Depends: ros-indigo-kobuki-keyop but it is not going to be installed
                     Depends: ros-indigo-kobuki-node but it is not going to be installed
                     Depends: ros-indigo-kobuki-random-walker but it is not going to be installed
                     Depends: ros-indigo-kobuki-rapps but it is not going to be installed
                     Depends: ros-indigo-kobuki-safety-controller but it is not going to be installed
                     Depends: ros-indigo-kobuki-testsuite but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

I have no idea how I can solve the error. Can you please give me information on that?