{ ... }:
{
  perSystem =
    { pkgs, ... }:
    {
      packages.video-webcam =
        (pkgs.writeShellApplication {
          name = "video-webcam";
          runtimeInputs = [
            pkgs.ffmpeg
          ];
          text = builtins.readFile ./video-webcam.sh;
        }).overrideAttrs
          { passthru.usage = builtins.readFile ./usage.kdl; };
    };
}