[vikingman@UFO:/etc/nixos]$ systemctl status bumblebeed
? bumblebeed.service - Bumblebee Hybrid Graphics Switcher
   Loaded: loaded (/nix/store/237icnx5l2mgg46rmw05v1s23jcfdy03-unit-bumblebeed.service/bumblebeed.service; enabled; vendor preset: enabled)
   Active: active (running) since Wed 2019-03-20 15:27:08 EDT; 10min ago
 Main PID: 738 (.bumblebeed-wra)
    Tasks: 1 (limit: 4486)
   Memory: 4.6M
   CGroup: /system.slice/bumblebeed.service
           ??738 /nix/store/zxn1z2771a9v8xax6jm9ysjq5x4kws4p-bumblebee-3.2.1/bin/bumblebeed --use-syslog -g wheel --driver nouveau --pm-method auto

Mar 20 15:33:49 UFO bumblebeed[738]: [XORG] (WW) Open ACPI failed (/var/run/acpid.socket) (No such file or directory)
Mar 20 15:33:49 UFO bumblebeed[738]: [XORG] (WW) Warning, couldn't open module mouse
Mar 20 15:33:49 UFO bumblebeed[738]: [XORG] (EE) Failed to load module "mouse" (module does not exist, 0)
Mar 20 15:33:49 UFO bumblebeed[738]: [XORG] (WW) Warning, couldn't open module mouse
Mar 20 15:33:49 UFO bumblebeed[738]: [XORG] (EE) Failed to load module "mouse" (module does not exist, 0)
Mar 20 15:33:49 UFO bumblebeed[738]: [XORG] (WW) Warning, couldn't open module libinput
Mar 20 15:33:49 UFO bumblebeed[738]: [XORG] (EE) Failed to load module "libinput" (module does not exist, 0)
Mar 20 15:33:49 UFO bumblebeed[738]: [XORG] (WW) Warning, couldn't open module libinput
Mar 20 15:33:49 UFO bumblebeed[738]: [XORG] (EE) Failed to load module "libinput" (module does not exist, 0)
Mar 20 15:33:49 UFO bumblebeed[738]: [XORG] (EE) /dev/dri/card0: failed to set DRM interface version 1.4: Permission denied