core/pkgs/by-name/xo/xorg/packages.nix

{ ... }:
res: pkgs: super:

with pkgs; {
  xorg =
    let
      # Use `lib.callPackageWith __splicedPackages` rather than plain `callPackage`
      # so as not to have the newly bound xorg items already in scope,  which would
      # have created a cycle.
      overrides = lib.callPackageWith __splicedPackages ./overrides.nix {
        inherit (darwin.apple_sdk.frameworks) ApplicationServices Carbon Cocoa;
        inherit (darwin.apple_sdk.libs) Xplugin;
        inherit (buildPackages.darwin) bootstrap_cmds;
        udev = if stdenv.isLinux then udev else null;
        libdrm = if stdenv.isLinux then libdrm else null;
      };

      generatedPackages = lib.callPackageWith __splicedPackages ./default.nix { };

      xorgPackages = makeScopeWithSplicing' {
        otherSplices = generateSplicesForMkScope "xorg";
        f = lib.extends overrides generatedPackages;
      };

    in
    recurseIntoAttrs xorgPackages;

  xwayland = callPackage ./xwayland.nix { };

  xcbutilxrm = callPackage ./xcb-util-xrm.nix { };
}