pratik@pratik-VirtualBox:~$ sudo apt-get install valac libgee-0.8-dev libdbus-glib-1-dev librsvg2-dev \
>                       libgles2-mesa-dev libode-dev \
>                       libxi-dev \
>                       libloudmouth1-dev libnice-dev build-essential
Reading package lists... Done
Building dependency tree       
Reading state information... Done
libdbus-glib-1-dev is already the newest version.
libgee-0.8-dev is already the newest version.
librsvg2-dev is already the newest version.
valac is already the newest version.
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:
 libgles2-mesa-dev : Depends: libegl1-mesa-dev
E: Unable to correct problems, you have held broken packages.
pratik@pratik-VirtualBox:~$