title: Error in install.packages : cannot remove prior installation of package ‘DBI’
body: <p>I attempted <code>install.packages("RMySQL")</code> and it runs for a second and then says:</p>
  
  <blockquote>
    <p>Error in install.packages : cannot remove prior installation of package ‘DBI’</p>
  </blockquote>
  
  <p>I did <code>remove.packages("DBI")</code> and it says:</p>
  
  <blockquote>
    <p>remove.packages("DBI")
    Removing package from ‘/Library/Frameworks/R.framework/Versions/3.2/Resources/library’
    (as ‘lib’ is unspecified)</p>
  </blockquote>
  
  <p>Then I retry <code>install.packages("RMySQL")</code> and it says:</p>
  
  <blockquote>
    <p>Error in install.packages : cannot remove prior installation of package ‘DBI’</p>
  </blockquote>
  
  <p>The DBI dependency is not actually getting removed or something. Or possibly I removed it from the wrong area? I'm confused. </p>