Problem in installing ros indigo in chroot

edit

Hi everyone,

I followed this tutorial step by step in a fresh installed ubuntu16.04 and everything goes fine. but the command

sudo apt-get install python-rosdep

caused to the following error:

The following packages have unmet dependencies:                                                                          python-rosdep : Depends: python-catkin-pkg but it is not installed                                                      python-rosdistro-modules : Depends: python-catkin-pkg-modules but it is not installed

I really searched but no solution found ... so any help is really appreciated.