{lib, ...}: let
  rootDirs = builtins.readDir ./.;
  removeFiles = lib.attrsets.filterAttrs (n: v: v == "directory") rootDirs;
  programsToPatch = builtins.attrNames removeFiles;

  getPatches = name:
    builtins.map (value: ./${name}/${value}) (builtins.attrNames (
      lib.attrsets.filterAttrs (
        n: v:
          v == "regular" && lib.strings.hasSuffix ".patch" n
      ) (builtins.readDir ./${name})
    ));

  bigOverlay = final: prev:
    lib.attrsets.mergeAttrsList (
      lib.lists.forEach programsToPatch (
        program: let
          unpatchedProgram = prev."${program}";
        in {
          "${program}" = unpatchedProgram.overrideAttrs {
            version = "${unpatchedProgram.version}-patched";
            __intentionallyOverridingVersion = true;
            patches = unpatchedProgram.patches ++ getPatches program;
          };
        }
      )
    );
in {
  nixpkgs.overlays = [
    (
      final: prev: {
        kdePackages = prev.kdePackages.overrideScope bigOverlay;
      }
    )
  ];
}