16:33:16-user~$ pyenv version
system (set by /usr/home/user/.pyenv/version)
16:33:25-user~$ cd ~/temp/
16:33:29-user~/temp$ mkdir pycerts
16:33:33-user~/temp$ cd pycerts/
16:33:35-user~/temp/pycerts$ echo pycert > .python-version
16:33:46-user~/temp/pycerts$ pyenv virtualenv 3.6.3 pycert
Requirement already satisfied: setuptools in /usr/home/user/.pyenv/versions/3.6.3/envs/pycert/lib/python3.6/site-packages
Requirement already satisfied: pip in /usr/home/user/.pyenv/versions/3.6.3/envs/pycert/lib/python3.6/site-packages
(pycert) 16:34:10-user~/temp/pycerts$ pip install certbot
Collecting certbot

BLA BLA BLA LALALALA BLA LBLALALALA LALALAA
SOMETHING GOING ON!!!!

  Downloading cffi-1.11.4.tar.gz (436kB)
    100% |████████████████████████████████| 440kB 1.4MB/s
Collecting future (from parsedatetime>=1.3->certbot)
  Using cached future-0.16.0.tar.gz
Collecting certifi>=2017.4.17 (from requests[security]>=2.4.1->acme==0.21.1->certbot)
  Using cached certifi-2018.1.18-py2.py3-none-any.whl
Collecting chardet<3.1.0,>=3.0.2 (from requests[security]>=2.4.1->acme==0.21.1->certbot)
  Using cached chardet-3.0.4-py2.py3-none-any.whl
Collecting urllib3<1.23,>=1.21.1 (from requests[security]>=2.4.1->acme==0.21.1->certbot)
  Using cached urllib3-1.22-py2.py3-none-any.whl
Collecting pycparser (from cffi>=1.7->cryptography>=1.2->certbot)
  Using cached pycparser-2.18.tar.gz
Installing collected packages: pbr, six, mock, zope.interface, ConfigArgParse, certifi, chardet, idna, urllib3, asn1crypto, pycparser, cffi, cryptography, PyOpenSSL, requests, josepy, pytz, pyrfc3339, acme, zope.event, zope.component, future, parsedatetime, configobj, certbot
  Running setup.py install for zope.interface ... done
  Running setup.py install for ConfigArgParse ... done
  Running setup.py install for pycparser ... done
  Running setup.py install for cffi ... done
  Running setup.py install for cryptography ... done
  Running setup.py install for future ... done
  Running setup.py install for parsedatetime ... done
  Running setup.py install for configobj ... done
Successfully installed ConfigArgParse-0.13.0 PyOpenSSL-17.5.0 acme-0.21.1 asn1crypto-0.24.0 certbot-0.21.1 certifi-2018.1.18 cffi-1.11.4 chardet-3.0.4 configobj-5.0.6 cryptography-2.1.4 future-0.16.0 idna-2.6 josepy-1.0.1 mock-2.0.0 parsedatetime-2.4 pbr-3.1.1 pycparser-2.18 pyrfc3339-1.0 pytz-2018.3 requests-2.18.4 six-1.11.0 urllib3-1.22 zope.component-4.4.1 zope.event-4.3.0 zope.interface-4.4.3