nixos/system76: fix evaluation

Changed files
+1 -1
nixos
modules
hardware
+1 -1
nixos/modules/hardware/system-76.nix
···
};
};
-
power-pkg = pkgs.system76-power;
+
power-pkg = config.boot.kernelPackages.system76-power;
powerConfig = mkIf cfg.power-daemon.enable {
# Make system76-power usable by root from the command line.
environment.systemPackages = [ power-pkg ];