title: pip has problems with metadata
body: <p>I'm trying to install the <code>win32core</code> module using pip, but it keeps displaying warnings about the package/wheel metadata not matching with the filename (inconsistent version).</p>
  <p>Here's a snippet of the text displayed in the command prompt before it goes to download older versions:</p>
  <pre><code>python -m pip install --no-cache-dir win32core
  Collecting win32core
    Downloading win32core-221.28.tar.gz (2.1 MB)
       |████████████████████████████████| 2.1 MB 2.2 MB/s
    Installing build dependencies ... done
    Getting requirements to build wheel ... done
      Preparing wheel metadata ... done
  WARNING: Discarding https://files.pythonhosted.org/packages/24/
  0a6e0b2e201c76ccd3cda1f97bd64d45daa2b899b50e541962748ec5bc9f5d/
  win32core-221.28.tar.gz#
  sha256=e805548ccde99a3f36931d3eef72cfaaa5dace4288393af898c96f92c1fe5f9e (from https://pypi.org/simple/win32core/).
  Requested win32core from https://files.pythonhosted.org/packages/
  24/0a/6e0b2e201c76ccd3cda1f97bd64d45daa2b899b50e541962748ec5bc9f5d/win32core-221.28.tar.gz#
  sha256=e805548ccde99a3f36931d3eef72cfaaa5dace4288393af898c96f92c1fe5f9e
  has inconsistent version: filename has '221.28', but metadata has '0.0.0'
  </code></pre>
  <p>As I've encountered this before, how should I go about installing the module correctly? (I'm on Python 3.9.1)</p>