title: R: Cannot use 0-cloud to install.packages
body: <p>When I try to install packages from 0-cloud it doesn't work</p>
  
  <pre><code>&gt; install.packages("lfactors")
  --- Please select a CRAN mirror for use in this session ---
  </code></pre>
  
  <p>then I select 0-cloud from the list of repositories. and R returns</p>
  
  <pre><code>Warning: unable to access index for repository https://cran.rstudio.com/src/contrib
  Warning: unable to access index for repository https://cran.rstudio.com/bin/windows/contrib/3.2
  Warning message:
  package ‘lfactors’ is not available (for R version 3.2.1) 
  </code></pre>
  
  <p>But, when I run this code and select another repository it does work.</p>
  
  <p>I tried turning off my proxy server, and visiting the site with the proxy server on and I can visit it in the browser with no issue.</p>
  
  <p>Any ideas?</p>
  
  <p>Edit:
  based on a comment, I ran this</p>
  
  <pre><code>capabilities()["libcurl"]
  libcurl 
     TRUE
  </code></pre>
  
  <p>So I think it's not that.</p>