sudo apt-get install build-essential libpcre3 libpcre3-dev libssl-dev
Reading package lists... Done
Building dependency tree
Reading state information... Done
libpcre3 is already the newest version.
libpcre3 set to manually installed.
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:
 build-essential : Depends: libc6-dev but it is not going to be installed or
                            libc-dev
                   Depends: g++ (>= 4:4.4.3) but it is not going to be installed
 libpcre3-dev : Depends: libc6-dev but it is not going to be installed
                Depends: libpcre3 (= 1:8.30-5) but 2:8.35-6 is to be installed
 libssl-dev : Depends: libssl1.0.0 (= 1.0.1e-2+deb7u17) but 1.0.2c-1 is to be installed
              Depends: zlib1g-dev but it is not going to be installed
              Recommends: libssl-doc but it is not going to be installed
E: Unable to correct problems, you have held broken packages.