installation dosnt complete

[nourBerro]

when i try vagrant up the following issue is raised
Downloading/unpacking honcho (from bench==4.1.0)
default: Downloading honcho-1.0.1-py2.py3-none-any.whl
default: Downloading/unpacking python-crontab (from bench==4.1.0)
default: Cleaning up...
default: Exception:
default: Traceback (most recent call last):
default: File "/usr/lib/python2.7/dist-packages/pip/basecommand.py", line 122, in main
default: status = self.run(options, args)
default: File "/usr/lib/python2.7/dist-packages/pip/commands/install.py", line 278, in run
default: requirement_set.prepare_files(finder, force_root_egg_info=self.bundle, bundle=self.bundle)
default: File "/usr/lib/python2.7/dist-packages/pip/req.py", line 1198, in prepare_files
default: do_download,
default: File "/usr/lib/python2.7/dist-packages/pip/req.py", line 1376, in unpack_url
default: self.session,
default: File "/usr/lib/python2.7/dist-packages/pip/download.py", line 582, in unpack_http_url
default: unpack_file(temp_location, location, content_type, link)
default: File "/usr/lib/python2.7/dist-packages/pip/util.py", line 643, in unpack_file
default: untar_file(filename, location)
default: File "/usr/lib/python2.7/dist-packages/pip/util.py", line 574, in untar_file
default: path = os.path.join(location, fn)
default: File "/usr/lib/python2.7/posixpath.py", line 80, in join
default: path += '/' + b
default: UnicodeDecodeError: 'ascii' codec can't decode byte 0xc5 in position 19: ordinal not in range(128)
default: Storing debug log for failure in /home/vagrant/.pip/pip.log

[bndn]

I have the same error on my Debian Jessie server (Python 2.7).