Works here:- sudo pip3 install adafruit-blinka Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple Collecting adafruit-blinka Downloading https://www.piwheels.org/simple/adafruit-blinka/Adafruit_Blinka-2.2.0-py3-none-any.whl (79kB) 100% |################################| 81kB 123kB/s .. - Original Installation Raspberry Pi reference 2019-06-20 - Current OS Distributor ID: Raspbian Description: Raspbian GNU/Linux 10 (buster) Release: 10 Codename: buster - Kernel 4.19.58-v7l+ - Model Raspberry Pi 4 Model B Rev 1.1