The following packages have unmet dependencies:
libsdl1.2-dev : Depends: libx11-dev but it is not going to be installed
Depends: libglu1-mesa-dev but it is not going to be installed
Depends: libasound2-dev
Depends: libpulse-dev but it is not going to be installed
Depends: libcaca-dev but it is not going to be installed
Depends: libxt-dev but it is not going to be installed
Depends: libxext-dev but it is not going to be installed
então eu digitei:
evan@evan-XPS-13-9350:~$ sudo apt-get update && sudo apt-get upgrade
and this was the output: Calculating upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.