Installation hangs at "Running install for cryptography"

On my Debian 8, when running ./letsencrypt-auto --help --verbose the output stops at the following lines:

Requirement already up-to-date: pycparser in /root/.local/share/letsencrypt/lib/python2.7/site-packages (from cffi>=1.1.0->cryptography>=0.7->letsencrypt)
Installing collected packages: cryptography, PyOpenSSL, requests, parsedatetime, configobj, pytz, psutil, ndg-httpsclient, werkzeug, funcsigs, pbr, mock, pyrfc3339, acme, zope.event, zope.component, ConfigArgParse, letsencrypt, python-augeas, letsencrypt-apache
  Running install for cryptography

What could this be? Any help is greatly appreciated!

Do either of the topics


help ?

That step involves compiling python-cryptography, and can be very slow on some systems. Debian 8 backported packages that don’t require any expensive steps like that are on the way in the next few weeks!


It really seems like it takes quite a while on the target system. After about 20 minutes or something cryptography was finished. Works now! Thanks :slight_smile:

20 minutes is insanely slow, but could make sense if the system has limited RAM but enough swap space to complete while thrashing.