title: conda build R packages to different library location
body: <p>I'm following the instructions from <a href="https://www.continuum.io/content/conda-data-science" rel="nofollow noreferrer">https://www.continuum.io/content/conda-data-science</a> in order to build a CRAN-available R package (e.g. synthpop).</p>
  
  <pre><code>conda skeleton cran synthpop
  conda build r-synthpop
  </code></pre>
  
  <p>How can I change the default conda build sequence to install to a different library location, as I don't have permission to install to the default one? </p>
  
  <pre><code>* installing to library ‘/path/to/default/lib’
  Error: ERROR: no permission to install to directory ‘/path/to/default/lib’
  </code></pre>
  
  <p>Also, I'm running conda build from within a virtual env.</p>
  
  <p>Raised this as an issue here: <a href="https://github.com/ContinuumIO/anaconda-issues/issues/1562" rel="nofollow noreferrer">https://github.com/ContinuumIO/anaconda-issues/issues/1562</a></p>