Directory https://raw.githubusercontent.com/home-assistant/supervised-installer/master/ returns "404 not found" However https://raw.githubusercontent.com/home-assistant/supervised-installer/3717667ff1e544b9660d3a6ab7e9b29f8b33a049/ does. To make this work again one must change the curl command to curl - Lo installer.sh https: //raw.githubusercontent.com/home-assistant/supervised-installer/master/installer.sh And edit the URL_RAW_BASE in installer.sh URL_RAW_BASE = "https://raw.githubusercontent.com/home-assistant/supervised-installer/3717667ff1e544b9660d3a6ab7e9b29f8b33a049/files" While I was in there I also removed the problematic NetworkManager snippet (the couple of lines below # Create config for NetworkManager )