title: I cannot install Tensorflow Version 1.15 through pip
body: <p>I have checked my <code>pip</code> version and got the following output:</p>
  
  <pre class="lang-sh prettyprint-override"><code>Requirement already up-to-date: pip in 
  ./anaconda3/envs/runlee_python3/lib/python3.8/site-packages (20.1)
  </code></pre>
  
  <p>I have a specific situation in which I have to use version 1.15 of Tensorflow, but when I try to install it, it seems like it can‘t find this specific version.</p>
  
  <pre class="lang-sh prettyprint-override"><code>pip install tensorflow==1.15
  ERROR: Could not find a version that satisfies the requirement tensorflow==1.15 (from versions: 2.2.0rc1, 2.2.0rc2, 2.2.0rc3)
  ERROR: No matching distribution found for tensorflow==1.15
  </code></pre>
  
  <p>I can also not find version 1.15 when listing all available options.</p>
  
  <p>What am I missing?</p>