nixos/modules/droidcam/default.nix

# Edit this configuration file to define what should be installed on
# your system.  Help is available in the configuration.nix(5) man page
# and in the NixOS manual (accessible by running ‘nixos-help’).

{ ... }:
{
  programs.droidcam.enable = true;
  # required for USB connection
  services.usbmuxd.enable = true;
  environment.shellAliases = {
    webcam = "droidcam-cli -size=1920x1080 ios 4747";
  };
}