Estou tentando instalar a biblioteca GTK no Ubuntu 16.04 LTS, mas estou recebendo um erro dizendo E: Incapaz de corrigir problemas, você realizou pacotes quebrados.
nikhil@nikhil-desktop:~$ sudo apt-get install libgtk-3-dev
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:
libgtk-3-dev : Depends: libgtk-3-0 (= 3.18.9-1ubuntu3) but 3.20.8-1ubuntu0~ppa1 is to be installed
Depends: gir1.2-gtk-3.0 (= 3.18.9-1ubuntu3) but 3.20.8-1ubuntu0~ppa1 is to be installed
Depends: libgdk-pixbuf2.0-dev (>= 2.30.0) but it is not going to be installed
Depends: libpango1.0-dev (>= 1.37.3) but it is not going to be installed
Depends: libatk-bridge2.0-dev but it is not going to be installed
Depends: libepoxy-dev (>= 1.0) but it is not going to be installed
Depends: libxcursor-dev but it is not going to be installed
Depends: libegl1-mesa-dev but it is not going to be installed
Depends: libwayland-dev (>= 1.5.91) but it is not going to be installed
Depends: libmirclient-dev (>= 0.13.3) but it is not going to be installed
Depends: nettle-dev but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
Como posso corrigir esse problema, estou tentando instalar o opencv com esta biblioteca de pacotes, como posso instalá-lo sem erros, estou seguindo as instruções da pesquisa do PYimage.