[Nix-dev] Tablet stylus stopped working

[Jeffrey David Johnson]

My wacom stylus recently stopped working. I wasn't doing anything
nix-related at the time (just working in Inkscape) and booting into
older generations doesn't fix it. The eraser tip and side button keep
working but nothing from the main tip. I can't get it to show up in xev
or kde_wacom_tabletfinder. Is there anywhere else to look before
assuming it's a hardware failure? This is the tablet section of my
configuration.nix:

    # ...
    environment.systemPackages = [
      libwacom
      xf86_input_wacom
    ];
    services = {
      xserver = {
        wacom.enable = true;
        synaptics = {
          enable = true;
          twoFingerScroll = true;
        };
      };
    };
    # ...

Thanks
Jeff