title: pip install sqlalchemy-migrate crashes and burns inexplicably
body: <p>Running Python in a virtualenv under Windows 8 x64, working my way through the <a href="http://blog.miguelgrinberg.com/post/the-flask-mega-tutorial-part-i-hello-world" rel="nofollow">flask megatutorial</a>. There's a very thorough setup guide, and one of the things I have to do is install sqlalchemy-migrate.</p>
  
  <p>I do this in the sequence given in the guide, no steps skipped. With the virtualenv active, taking care to use the right interpreter, I run:</p>
  
  <pre><code>pip install sqlalchemy-migrate
  </code></pre>
  
  <p>At which point it crunches and finally returns:</p>
  
  <pre><code>Installed c:\users\erez\code\flask-megatutorial\flask\build\sqlalchemy-migrate\pbr-0.5.23-py2.7.egg
  
  running egg_info
  
  creating pip-egg-info\sqlalchemy_migrate.egg-info
  
  writing requirements to pip-egg-info\sqlalchemy_migrate.egg-info\requires.txt
  
  writing pip-egg-info\sqlalchemy_migrate.egg-info\PKG-INFO
  
  writing top-level names to pip-egg-info\sqlalchemy_migrate.egg-info\top_level.txt
  
  writing dependency_links to pip-egg-info\sqlalchemy_migrate.egg-info\dependency_links.txt
  
  writing entry points to pip-egg-info\sqlalchemy_migrate.egg-info\entry_points.txt
  
  [pbr] Processing SOURCES.txt
  
  writing manifest file 'pip-egg-info\sqlalchemy_migrate.egg-info\SOURCES.txt'
  
  warning: LocalManifestMaker: standard file '-c' not found
  
  error: The system cannot find the file specified
  </code></pre>
  
  <p>And now I'm stuck. :) Googled the heck out of this. Seems related to PBR, whatever that is, but no resolution. There's a pip.log file too, but it's too big to paste in here, and I know StackOverflow frowns on gists. Still, happy to paste it to a gist if you guys think it would help.</p>
  
  <p>Any help would be most appreciated.</p>