Collecting tw.prototype==0.8
  1 location(s) to search for versions of tw.prototype:
  * https://pypi.python.org/simple/tw-prototype/
  Getting page https://pypi.python.org/simple/tw-prototype/
  Analyzing links from page https://pypi.python.org/simple/tw-prototype/
    Found link https://pypi.python.org/packages/18/17/ed4f4be6008319d39f960daa8eca303bca57af64b8bb2c01d0f697f91de3/tw.prototype-0.8.tar.gz#md5=c8d7063bcc940ec8bcf78b130f16eb37 (from https://pypi.python.org/simple/tw-prototype/), version: 0.8
    Skipping link https://pypi.python.org/packages/ee/b8/60c0333b6fbf108ba694f8ae65d938fc1ac86f426f6ae48b03da8d4f1789/tw.prototype-0.8-py2.5.egg#md5=8719cb59455be5c1e8adbcbb6d7bd521 (from https://pypi.python.org/simple/tw-prototype/); unsupported archive format: .egg
  Using version 0.8 (newest of versions: 0.8)
  Downloading tw.prototype-0.8.tar.gz
  Downloading from URL https://pypi.python.org/packages/18/17/ed4f4be6008319d39f960daa8eca303bca57af64b8bb2c01d0f697f91de3/tw.prototype-0.8.tar.gz#md5=c8d7063bcc940ec8bcf78b130f16eb37 (from https://pypi.python.org/simple/tw-prototype/)
  Running setup.py (path:/tmp/pip-build-ahy4h47k/tw.prototype/setup.py) egg_info for package tw.prototype
    Running command python setup.py egg_info
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip-build-ahy4h47k/tw.prototype/setup.py", line 56, in <module>
        execfile(os.path.join("tw", "prototype", "release.py"))
    NameError: name 'execfile' is not defined
Cleaning up...
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-ahy4h47k/tw.prototype/
Exception information:
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/pip/basecommand.py", line 215, in main
    status = self.run(options, args)
  File "/usr/lib/python3/dist-packages/pip/commands/wheel.py", line 199, in run
    if not wb.build():
  File "/usr/lib/python3/dist-packages/pip/wheel.py", line 749, in build
    self.requirement_set.prepare_files(self.finder)
  File "/usr/lib/python3/dist-packages/pip/req/req_set.py", line 380, in prepare_files
    ignore_dependencies=self.ignore_dependencies))
  File "/usr/lib/python3/dist-packages/pip/req/req_set.py", line 634, in _prepare_file
    abstract_dist.prep_for_dist()
  File "/usr/lib/python3/dist-packages/pip/req/req_set.py", line 129, in prep_for_dist
    self.req_to_install.run_egg_info()
  File "/usr/lib/python3/dist-packages/pip/req/req_install.py", line 439, in run_egg_info
    command_desc='python setup.py egg_info')
  File "/usr/lib/python3/dist-packages/pip/utils/__init__.py", line 725, in call_subprocess
    % (command_desc, proc.returncode, cwd))
pip.exceptions.InstallationError: Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-ahy4h47k/tw.prototype/