title: Conda hangs in "solving environment" when installing STSci packages
body: <p>I run Ubuntu 18.04.1 LTS on a virtual machine on Windows 10. I've installed Anaconda 5.3 without any issues, but when I try to install an STSCI environment with the command line:</p>
  <pre><code>conda create -n astroconda stsci
  </code></pre>
  <p>the terminal gets stuck in &quot;Solving Environment&quot; (I have version 4.5.11 of conda). Yesterday I waited for about 4 hours before giving up. I would like to know if there is a known issue about this problem and if it can be related to the quantity of disk and RAM assigned to the virtual machine.</p>