{
  config,
  pkgs,
  options,
  lib,
  myLib,
  ...
}:
with builtins;
with lib;
let
  cfg = config.aviallon.overlays;
  pkgNames = pkgs: forEach pkgs (p: "${getName p}-${p.version}");
in
{

  imports = [
    (mkRenamedOptionModule
      [ "aviallon" "overlays" "optimizations" ]
      [ "aviallon" "optimizations" "enable" ]
    )
  ];

  options.aviallon.overlays = {
    enable = mkOption {
      default = true;
      example = false;
      description = "Wether to enable system-wide overlays or not";
      type = types.bool;
    };
    traceCallPackage = mkEnableOption "printing package names each time callPackage is evaluated";
  };
  config = mkIf cfg.enable {
    nix.nixPath =
      # Append our nixpkgs-overlays.
      [ "nixpkgs-overlays=/etc/nixos/overlays-compat/" ];

    nixpkgs.overlays =
      [ ]
      ++ optional cfg.traceCallPackage (
        self: super: {
          callPackage =
            path: overrides:
            let
              _pkg = super.callPackage path overrides;
              _name = _pkg.name or _pkg.pname or "<unknown>";
            in
            trace "callPackage ${_name}" _pkg;
        }
      )
      ++ [
        (self: super: {
          htop = super.htop.overrideAttrs (old: {
            configureFlags = old.configureFlags ++ [
              "--enable-affinity"
              "--enable-delayacct"
              "--enable-capabilities"
            ];

            nativeBuildInputs =
              old.nativeBuildInputs
              ++ (with super; [
                pkg-config
              ]);
            buildInputs =
              old.buildInputs
              ++ (with super; [
                libcap
                libunwind
                libnl
              ]);
          });
          ark = super.ark.override {
            unfreeEnableUnrar = true;
          };

        })
        # (final: prev: {
        #  # linux-manual requires scripts/split-man.pl from the kernel source, but
        #  # neither xanmod 6.19.7 nor vanilla 6.18.x ship it yet.  Mark broken so
        #   # the build doesn't fail; man-pages and man-pages-posix still build fine.
        #   linux-manual = prev.linux-manual.overrideAttrs (_: {
        #     meta = (prev.linux-manual.meta or { }) // {
        #       broken = true;
        #     };
        #   });
        # })

        (final: prev: {
          lutris-fhs = (
            prev.buildFHSUserEnv {
              name = "lutris";
              targetPkgs =
                pkgs:
                (with pkgs; [
                  glibc
                  bashInteractive

                  python3Full

                  lutris
                  gamescope
                  wineWow64Packages.waylandFull
                  flatpak
                ]);

              # symlink shared assets, including icons and desktop entries
              extraInstallCommands = ''
                ln -s "${pkgs.lutris}/share" "$out/"
              '';

              runScript = "/usr/bin/lutris";
            }
          );
        })

        (
          final: prev:
          let
            pycharm-common =
              pkg:
              let
                myIsDerivation = x: !(myLib.derivations.isBroken x);
                interpreters = pkgs: filter (x: myIsDerivation x) (attrValues pkgs.pythonInterpreters);
              in
              prev.buildFHSUserEnv rec {
                name = pkg.pname;
                targetPkgs =
                  pkgs:
                  (
                    with pkgs;
                    [
                      glibc
                      bashInteractive
                      zlib

                      python3Full

                      pkg
                    ]
                    ++ trace "Using the following interpreters: ${toString (pkgNames (interpreters pkgs))}" (
                      interpreters pkgs
                    )
                  );

                # symlink shared assets, including icons and desktop entries
                extraInstallCommands = ''
                  ln -s "${pkg}/share" "$out/"
                '';

                runScript = "/usr/bin/${pkg.pname}";
              };
          in
          {
            jetbrains = prev.jetbrains // {
              pycharm-community-fhs = pycharm-common prev.jetbrains.pycharm-community;
              pycharm-professional-fhs = pycharm-common prev.jetbrains.pycharm-professional;

              clion-fhs =
                let
                  compilers =
                    pkgs:
                    with pkgs;
                    with llvmPackages_17;
                    [
                      (setPrio (-9) gcc13)
                      (hiPrio clang)
                      clang-unwrapped
                      libcxx
                    ];
                in
                prev.buildFHSUserEnv rec {
                  name = "clion";
                  targetPkgs =
                    pkgs:
                    (
                      with pkgs;
                      [
                        jetbrains.clion
                        (hiPrio cmake)
                        (hiPrio ninja)
                        gnumake
                        extra-cmake-modules
                      ]
                      ++ trace "Using the following compilers: ${toString (pkgNames (compilers pkgs))}" (compilers pkgs)
                    );
                  # symlink shared assets, including icons and desktop entries
                  extraInstallCommands = ''
                    ln -s "${prev.jetbrains.clion}/share" "$out/"
                  '';
                  extraOutputsToInstall = [
                    "include"
                    "dev"
                    "doc"
                  ];

                  runScript = "/usr/bin/clion";
                };
            };
          }
        )

      ];
    aviallon.programs.allowUnfreeList = [
      "unrar"
      "ark"
    ];
  };
}