{ lib
, stdenv
, rustPlatform
, fetchFromGitHub
, makeBinaryWrapper
, pixman
, pkg-config
, libinput
, libglvnd
, libxkbcommon
, mesa
, seatd
, udev
, xwayland
, wayland
, xorg
, useXWayland ? true
, systemd
, useSystemd ? lib.meta.availableOn stdenv.hostPlatform systemd
}:

rustPlatform.buildRustPackage rec {
  pname = "cosmic-comp";
  version = "1.0.0-alpha.2";

  src = fetchFromGitHub {
    owner = "pop-os";
    repo = "cosmic-comp";
    rev = "epoch-${version}";
    hash = "sha256-IbGMp+4nRg4v5yRvp3ujGx7+nJ6wJmly6dZBXbQAnr8=";
  };

  useFetchCargoVendor = true;
  cargoHash = "sha256-4ahdQ0lQbG+lifGlsJE0yci4j8pR7tYVsMww9LyYyAA=";

  separateDebugInfo = true;

  nativeBuildInputs = [ makeBinaryWrapper pkg-config ];
  buildInputs = [
      libglvnd
      libinput
      libxkbcommon
      mesa
      pixman
      seatd
      udev
      wayland
    ] ++ lib.optional useSystemd systemd;

  # Only default feature is systemd
  buildNoDefaultFeatures = !useSystemd;

  # Force linking to libEGL, which is always dlopen()ed, and to
  # libwayland-client, which is always dlopen()ed except by the
  # obscure winit backend.
  RUSTFLAGS = map (a: "-C link-arg=${a}") [
    "-Wl,--push-state,--no-as-needed"
    "-lEGL"
    "-lwayland-client"
    "-Wl,--pop-state"
  ];

  makeFlags = [
    "prefix=$(out)"
    "CARGO_TARGET_DIR=target/${stdenv.hostPlatform.rust.cargoShortTarget}"
  ];

  dontCargoInstall = true;

  # These libraries are only used by the X11 backend, which will not
  # be the common case, so just make them available, don't link them.
  postInstall = ''
    wrapProgramArgs=(--prefix LD_LIBRARY_PATH : ${lib.makeLibraryPath [
        xorg.libX11 xorg.libXcursor xorg.libXi
    ]})
  '' + lib.optionalString useXWayland ''
    wrapProgramArgs+=(--prefix PATH : ${lib.makeBinPath [ xwayland ]})
  '' + ''
    wrapProgram $out/bin/cosmic-comp "''${wrapProgramArgs[@]}"
  '';

  meta = with lib; {
    homepage = "https://github.com/pop-os/cosmic-comp";
    description = "Compositor for the COSMIC Desktop Environment";
    mainProgram = "cosmic-comp";
    license = licenses.gpl3Only;
    maintainers = with maintainers; [ qyliss nyabinary ];
    platforms = platforms.linux;
  };
}