xorg.xorgserver: Use substitute in patches instead of postPatch

{ abiCompat ? null,

  callPackage,

  lib, stdenv, makeWrapper, fetchurl, fetchpatch, fetchFromGitLab, buildPackages,

  lib, stdenv, makeWrapper, fetchurl, fetchpatch, fetchFromGitLab, buildPackages, substitute,

  automake, autoconf, libiconv, libtool, intltool,

  freetype, tradcpp, fontconfig, meson, ninja, ed, fontforge,

  libGL, spice-protocol, zlib, libGLU, dbus, libunwind, libdrm, netbsd,

            name = "revert-fb-changes-2.patch";

          })

          ./darwin/bundle_main.patch

          ./darwin/stub.patch

          (substitute {

            src = ./darwin/stub.patch;

            replacements = ["--subst-var-by" "XQUARTZ_APP" "${placeholder "out"}/Applications/XQuartz.app"];

          })

        ];

        postPatch = attrs.postPatch + ''

          substituteInPlace hw/xquartz/mach-startup/stub.c \

            --subst-var-by XQUARTZ_APP "$out/Applications/XQuartz.app"

        '';

        configureFlags = [

          # note: --enable-xquartz is auto

          "CPPFLAGS=-I${./darwin/dri}"