quando eu digito o comando:
sudo apt-get install libboost-all-dev libx11-dev libx11-dev:i386 libxtst-dev libconfig++-dev build-essential qt5-default
eu entendo isso:
Reading package lists... Done
Building dependency tree
Reading state information... Done
build-essential is already the newest version (12.4ubuntu1).
libx11-dev is already the newest version (2:1.6.4-3).
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:
libboost-all-dev : Depends: libboost-iostreams-dev but it is not going to be installed
Depends: libboost-mpi-dev but it is not going to be installed
Depends: libboost-mpi-python-dev but it is not going to be installed
Depends: libboost-regex-dev but it is not going to be installed
libxtst-dev : Depends: libxext-dev but it is not going to be installed
Depends: libxi-dev but it is not going to be installed
qt5-default : Depends: qtbase5-dev but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
como faço para corrigir isso?
RESULTADO DO APT-CACHE: link
edit: todos os pacotes possuem dependências ausentes