don't suppress error messages
don't suppress error messages

Signed-off-by: Kenneth Reitz <b1c1d8736f20db3fb6c1c66bb1455ed43909f0d8@kennethreitz.org>

heroku/heroku-buildpack-python,benjaminfox/heroku-buildpack-python-geoip,AltSchool/heroku-buildpack-python,Scalingo/python-buildpack,skilljar/heroku-buildpack-python,heroku/heroku-buildpack-python,benjaminfox/heroku-buildpack-python-geoip,benmurden/heroku-buildpack-python-ember,AltSchool/heroku-buildpack-python,ad-m/heroku-buildpack-python,benmurden/heroku-buildpack-python-ember,Scalingo/python-buildpack,edmorley/heroku-buildpack-python,joshfriend/heroku-buildpack-python,ad-m/heroku-buildpack-python