nixos-config/config/modules/bspwm/picom.nix

{ ... }:
{
  services.picom = {
    enable = true;
    backend = "glx";

    activeOpacity = 1;
    inactiveOpacity = 0.75;
    shadow = true;
    vSync = true;

    settings = {
      blur = {
        method = "gaussian";
        size = 50;
        deviation = 10.0;
      };
      corner-radius = 15;
    };
  };
}