trying https://www.segger.com/downloads/jlink/JLink_Linux_V970_x86_64.tgz
curl: (43) HTTP upload cannot be resumed
error checking the existence of https://tarballs.nixos.org//sha256-oYDvdsSIw/rlM/foZRUuD/0TzvONOtQL5fr3XmJkowI=:
error: cannot download JLink_Linux_V970_x86_64.tgz from any mirror