title: How to disable building R packages from source?
body: <p>I'm using Ubuntu 16.04 and some time ago I turned on building R packages from source. I did it because one of the packages I wanted to use didn't work properly when it wasn't compiled locally. Now I'm a bit fed up with the lengthy process of building from source so I want to turn it off. Compiling works fine but it takes too much time. I couldn't find any instructions about disabling it. </p>
  
  <p>How to stop building R packages from source?</p>