Update virtualenv.markdown (#7574)

Added instructions for development libraries (build-essential libssl-dev libffi-dev) required for cffi, bcrypt, and cryptography. This may not be necessary on some Debian based systems for desktops with dev libraries installed but for server installations (I tested with Armbian) this is required.
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firstmentoring 2018-11-18 01:17:23 -07:00 committed by Fabian Affolter
parent 2318aee109
commit f373db2c38

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@ -14,7 +14,7 @@ If you already have Python 3.5.3 or later installed, you can easily give Home As
It's recommended when installing Python packages that you use a [virtual environment](https://docs.python.org/3.5/library/venv.html#module-venv). This will make sure that your Python installation and Home Assistant installation won't impact one another. The following steps will work on most UNIX like systems.
_(If you're on a Debian based system, you will need to install Python virtual environment support using `apt-get install python3-pip python3-venv`.)_
_(If you're on a Debian based system, you will need to install Python virtual environment support using `apt-get install python3-pip python3-venv`. You may also need to install development libraries using `apt-get install build-essential libssl-dev libffi-dev python-dev`.)_
<p class='Note'>
It is recommended to use the [advanced guide](/docs/installation/raspberry-pi/) which allows for the installation to run as a `homeassistant` user. The steps below may be shorter but some users find difficulty when applying updates and may run into issues.