title: PyPy not finding packages
body: <p>I'm relatively new to coding, this is my first Stack Overflow question! I recently installed PyPy. It works fine if the code I'm running doesn't import much. But when my code tries to import, e.g., NumPy, I get: "ModuleNotFoundError: No module named 'numpy'." Same with other major packages; though it seems to import Itertools. I know I have all these packages somewhere, because they work when I run the code through Jupyter, etc. Googling around it seems like PyPy should support all the major packages, so I assume I need to link them up somehow...? Any advice or links to resources much appreciated!</p>
  
  <p>MacOS 10.15.1</p>
  
  <pre><code>$ pypy3 --version
  Python 3.6.9 (5da45ced70e515f94686be0df47c59abd1348ebc, Nov 22 2019, 03:55:25)
  [PyPy 7.2.0 with GCC 4.2.1 Compatible Apple LLVM 11.0.0 (clang-1100.0.33.12)]
  </code></pre>