Package installation errors installing DOSBox

[SkittleBrau79]

When I try to install the DOSBox package I'm getting the error in the log below. Anyone have an idea? Thanks for any help!

Pi Model or other hardware: 3
Power Supply used: 2.5V
RetroPie Version Used: 4.1
Built From: Image provided by RetroPie
USB Devices connected: Keyboard
Controller used: Saitek Gamepad
Error messages received: See full error below
File: libsdl-net1.2-dev, libsdl-sound1.2-dev, libasound2-dev, libpng12-dev
Emulator: DOSBox
How to replicate the problem:
On the package installer screen, choose the optional package DOSBox (from either source or binary)

From the logs:

= = = = = = = = = = = = = = = = = = = = =
Installing dependencies for 'dosbox' : DOS emulator
= = = = = = = = = = = = = = = = = = = = =

Did not find needed package(s): libsdl-net1.2-dev libsdl-sound1.2-dev libasound2-dev libpng12-dev. I am trying to install them now.
Reading package lists...
Building dependency tree...
Reading state information...
libpng12-dev is already the newest version.
libpng12-dev set to manually installed.
libasound2-dev is already the newest version.
You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies:
libraspberrypi-dev : Depends: libraspberrypi0 (= 1.20161215-1) but 1.20161020-1 is to be installed
libraspberrypi-doc : Depends: libraspberrypi0 (= 1.20161215-1) but 1.20161020-1 is to be installed
libsdl-net1.2-dev : Depends: libsdl-net1.2 (= 1.2.8-4) but it is not going to be installed
libsdl-sound1.2-dev : Depends: libsdl-sound1.2 (= 1.0.3-7+b1) but it is not going to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).
Could not install package(s): libsdl-net1.2-dev libsdl-sound1.2-dev libasound2-dev libpng12-dev.

Log ended at: Mon 30 Jan 09:12:05 UTC 2017
Total running time: 0 hours, 0 mins, 3 secs

[BuZz]

You have a problem with your current packages/dependencies/database. go to a terminal and do

sudo apt-get update
sudo apt-get -f install
sudo apt-get dist-upgrade

[SkittleBrau79]

@BuZz Thank you very much, that fixed it! What types of actions cause this (so I don't repeat them)? I imagine there are a million reasons.

[BuZz]

@SkittleBrau79 you were installing packages before and your internet connection broke or an upgrade was interrupted or something. Impossible to say.