Python-pip SSL error - RuneAudio

[martibs]

I'm trying to build Spotify Connect Web (https://github.com/Fornoth/spotify-connect-web) on my Raspberry Pi 1B running RuneAudio. Installation is done through python-pip. Running pip gives this error message:

$this->bbcode_second_pass_code('', '[root@runeaudio spotify-connect-web-master]# pip install -r requirements.txt
pip is configured with locations that require TLS/SSL, however the ssl module in Python is not available.
Requirement already satisfied: cffi>=0.9.2 in /usr/lib/python3.6/site-packages (from -r requirements.txt (line 1))
Collecting Flask==0.11.1 (from -r requirements.txt (line 2))
Could not fetch URL https://pypi.python.org/simple/flask/: There was a problem confirming the ssl certificate: Can't connect to HTTPS URL because the SSL module is not available. - skipping
Could not find a version that satisfies the requirement Flask==0.11.1 (from -r requirements.txt (line 2)) (from versions: )
No matching distribution found for Flask==0.11.1 (from -r requirements.txt (line 2))')

However, SSL/TLS seems to be properly installed:
$this->bbcode_second_pass_code('', '[root@runeaudio spotify-connect-web-master]# pacman -Qs openssl
local/openssl 1.0.1.i-1
The Open Source toolkit for Secure Sockets Layer and Transport Layer Security
local/python-pyopenssl 16.2.0-2
Python3 wrapper module around the OpenSSL library
local/python2-pyopenssl 16.2.0-2
Python2 wrapper module around the OpenSSL library')
Why isn't SSL working in Python-pip?