anchor.diff:        hash = "sha256-bQC0QmkLalxdj4mDEdqvvOFtNwz2T1MpTDuMXGYeQ18=";
       };
     };
  +
  +  # Derived from subprojects/spdlog.wrap
  +  #
  +  # NOTE: We only statically link spdlog due to a bug in pressure-vessel:
  +  # https://github.com/ValveSoftware/steam-runtime/issues/511
  +  #
  +  # Once this fix is released upstream, we should switch back to using
  +  # the system provided spdlog
  +  spdlog = rec {
  +    version = "1.8.5";
  +    src = fetchFromGitHub {
  +      owner = "gabime";
  +      repo = "spdlog";
  +      rev = "refs/tags/v${version}";
  +      sha256 = "sha256-D29jvDZQhPscaOHlrzGN1s7/mXlcsovjbqYpXd7OM50=";
  +    };
  +    patch = fetchurl {
  +      url = "https://wrapdb.mesonbuild.com/v2/spdlog_${version}-1/get_patch";
  +      sha256 = "sha256-PDjyddV5KxKGORECWUMp6YsXc3kks0T5gxKrCZKbdL4=";
  +    };
  +  };
   in stdenv.mkDerivation rec {
     pname = "mangohud";
     version = "0.6.7-1";
  
positive.code:     })
    ];
  
    mesonFlags = [
      "-Duse_system_vulkan=enabled"
      "-Dvulkan_datadir=${vulkan-headers}/share"
      "-Dwith_wayland=enabled"
      "-Duse_system_spdlog=enabled"
    ] ++ lib.optionals gamescopeSupport [
      "-Dmangoapp_layer=true"
      "-Dmangoapp=true"
  
negative.code:   postUnpack = ''(
      cd "$sourceRoot/subprojects"
      cp -R --no-preserve=mode,ownership ${imgui.src} imgui-${imgui.version}
      cp -R --no-preserve=mode,ownership ${spdlog.src} spdlog-${spdlog.version}
    )'';
  
    patches = [
  