title: Setting up conda environment with really old python version
body: <p>I am writing some python scripts for a computer that, for various reasons, is stuck at python v2.7.5 (upgrading is not an option).</p>
  
  <p>I would like to set up a conda environment on my desktop to test the scripts out before transferring them to the production machine.</p>
  
  <pre class="lang-sh prettyprint-override"><code>$ conda create --name py275 python=2.7.5
  Collecting package metadata (current_repodata.json): done
  Solving environment: failed
  Collecting package metadata (repodata.json): done
  Solving environment: failed
  
  PackagesNotFoundError: The following packages are not available from current channels:
  
    - python=2.7.5
  
  Current channels:
  
    - https://repo.anaconda.com/pkgs/main/linux-64
    - https://repo.anaconda.com/pkgs/main/noarch
    - https://repo.anaconda.com/pkgs/r/linux-64
    - https://repo.anaconda.com/pkgs/r/noarch
  
  To search for alternate channels that may provide the conda package you're
  looking for, navigate to
  
      https://anaconda.org
  
  and use the search bar at the top of the page.
  </code></pre>
  
  <p>When I do <code>conda search python</code>, the oldest version available to me is 2.7.13, but if I go to anaconda.org and do a search, the <a href="https://anaconda.org/anaconda/python/files?version=2.7.5" rel="nofollow noreferrer">files for python 2.7.5</a> are there and they appear to be in the main channel.</p>
  
  <p>How can I point conda to those files to allow me to create the proper environment?</p>