title: Requirements.txt install numpy before scipy?
body: <p>I am running a python server using Azure and have a requirements.txt file to install the necessary dependencies.  Everything worked fine until I added scipy. On the build I get this first</p>
  
  <p><code>Using legacy setup.py install for scipy, since package 'wheel' is not installed.</code></p>
  
  <p>Then, once it starts to install it, it installs it before numpy, despite numpy being higher up on the requirements.txt.  I'm not sure what to do, here's my requirements.txt</p>
  
  <pre><code>wheel==0.34.2
  numpy==1.18.0
  bs4==0.0.1
  dash==1.12.0
  dash-table==4.7.0
  Flask==1.1.2
  pandas==1.0.4
  requests==2.12.4
  tweepy==3.8.0
  nltk==3.2.2
  scipy==1.2.3
  </code></pre>