{
  services.picom = {
    enable = true;
    fade = true;
    fadeDelta = 5;
    fadeSteps = [
      4.0e-2
      4.0e-2
    ];
    fadeExclude = [
      "window_type *= 'menu'"
      "name ~= 'Firefox$'"
      "focused = 1"
    ];
    shadow = true;
    shadowOffsets = [
      (-10)
      (-15)
    ];
    shadowOpacity = 0.8;
    shadowExclude = [
      "window_type *= 'menu'"
      "name ~= 'Firefox$'"
      "focused = 1"
    ];
    backend = "xrender";
    vSync = true;
    settings = {
      "unredir-if-possible" = true;
      "dbe" = true;
    };
    extraConfig = ''
      animations = (
        {
        	triggers = [ "open", "show" ];
        	preset = "slide-in";
        	direction = "up";
          duration = 0.2;
        }
      )
    '';
    extraArgs = [ "--legacy-backends" ];
  };

  nmt.script = ''
    assertFileContent \
        home-files/.config/picom/picom.conf \
        ${./picom-basic-configuration-expected.conf}

    serviceFile=$(normalizeStorePaths home-files/.config/systemd/user/picom.service)
    assertFileContent \
        "$serviceFile" \
        ${./picom-basic-configuration-expected.service}
  '';
}
