ROS Hydro-held broken packages [closed]

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Hi , I'm trying to install ROS Hydro on Raspberry Pi following the steps of the ROS wiki in a new installed version of Raspbian using NOOBS like it says here:

http://wiki.ros.org/ROSberryPi/Settin...

Everything is OK until I do :

sudo pip install -U rospkg sudo apt-get install python-rosdep python-rosinstall-generator build-essential

I get the next error:

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 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: python-rosdep : Depends: python-catkin-pkg but it is not going to be installed Depends: python-rospkg but it is not going to be installed Depends: python-rosdistro (>= 0.3.0) but it is not going to be installed python-rosinstall-generator : 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.

How can I install it correctly or correct the error?

Thank you.