pipsi install fails with OSError

[glsorre]

I am able to run curl https://raw.githubusercontent.com/mitsuhiko/pipsi/master/get-pipsi.py | python and everything else seem to work as expected a part from pip install which alwasy gives this error:

Traceback (most recent call last):
  File "/Users/gsorrentino/.local/bin/pipsi", line 11, in <module>
    sys.exit(cli())
  File "/Users/gsorrentino/.local/venvs/pipsi/lib/python2.7/site-packages/click/core.py", line 764, in __call__
    return self.main(*args, **kwargs)
  File "/Users/gsorrentino/.local/venvs/pipsi/lib/python2.7/site-packages/click/core.py", line 717, in main
    rv = self.invoke(ctx)
  File "/Users/gsorrentino/.local/venvs/pipsi/lib/python2.7/site-packages/click/core.py", line 1137, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/Users/gsorrentino/.local/venvs/pipsi/lib/python2.7/site-packages/click/core.py", line 956, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/Users/gsorrentino/.local/venvs/pipsi/lib/python2.7/site-packages/click/core.py", line 555, in invoke
    return callback(*args, **kwargs)
  File "/Users/gsorrentino/.local/venvs/pipsi/lib/python2.7/site-packages/click/decorators.py", line 27, in new_func
    return f(get_current_context().obj, *args, **kwargs)
  File "/Users/gsorrentino/.local/venvs/pipsi/lib/python2.7/site-packages/pipsi.py", line 366, in install
    if repo.install(package, python, editable):
  File "/Users/gsorrentino/.local/venvs/pipsi/lib/python2.7/site-packages/pipsi.py", line 236, in install
    if Popen(args).wait() != 0:
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 710, in __init__
    errread, errwrite)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 1335, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory