Achilleas Kotsis Thu, 02 Jun 2016 01:15:54 -0700
python-acme 0.6.0-1~bpo8+1 Breaks: python-certbot (<< 0.6.0), python-letsencrypt (<< 0.6.0)
And there isn't a python-letsencrypt version 0.6.0 on the repository, that is why it can't be installed. Achilleas Kotsis | Αχιλλέας Κώτσης
