code: def other_dependencies(ctx, server, environment):
      
      if 'extra_packages' in ctx.releaser:
          server = server.lower()
          extra_pkgs = []
          if server in ["local"]:
              if 'local' in ctx.releaser.extra_packages:
                  extra_pkgs.extend(ctx.releaser.extra_packages.local)
          elif server in ["testpypi", "pypitest"]:
              # these are packages not available on the test server, so install them
              # off the regular pypi server
              if 'test' in ctx.releaser.extra_packages and \
                                  ctx.releaser.extra_packages.test is not None:
                  extra_pkgs.extend(ctx.releaser.extra_packages.test)
          elif server in ["pypi"]:
              if 'pypi' in ctx.releaser.extra_packages and \
                                  ctx.releaser.extra_packages.pypi is not None:
                  extra_pkgs.extend(ctx.releaser.extra_packages.pypi)
          else:
              print("** Nothing more to install **")
  
          if extra_pkgs:
              print('** Other Dependencies, based on server', server, '**')
  
          for pkg in extra_pkgs:
              result = invoke.run('env{0}{1}{0}Scripts{0}pip{2} install {3}'
                                  .format(os.sep, environment, PIP_EXT, pkg),
                                  hide=True)
              if result.ok:
                  print('{}[{}GOOD{}] Installed {}'.format("", GOOD_COLOR,
                                                           RESET_COLOR, pkg))
              else:
                  print('{}[{}ERROR{}] Something broke trying to install '
                        'package: {}'.format("", ERROR_COLOR, RESET_COLOR, pkg))
                  print(result.stderr)
                  sys.exit(1)
docs: Install things that need to be in place before installing the main package.