You need to have Vala installed. You've got a long list of dependencies before it's going to finish compiling. This is pretty standard for compiling and instal

You need to have Vala installed. You've got a long list of dependencies before it's going to finish compiling. This is pretty standard for compiling and installing any software from source. Read further down and you'll see there's a shake-n-bake PPA ready to go.