{
  lib,
  flake-parts-lib,
  ...
}:
let
  inherit (lib) mkOption mkPackageOption mkEnableOption types;
  inherit (flake-parts-lib) mkPerSystemOption;
in {
  options.perSystem = mkPerSystemOption ({ config, ... }: {
    options = {
      texShell = {
        scheme = mkPackageOption pkgs "texliveSmall" {};
        extraPackages = mkOption {
          type = types.functionTo (types.listOf types.package);
          description = "Extra packages to add to the texlive scheme";
          default = _: [];
        };
        latexmk = {
          enable = mkEnableOption "latexmk";
          rc = mkOption {
            type = types.lines;
            description = "contents of the .latexmkrc file";
          };
          rcFile = mkOption {
            type = types.path;
            default = pkgs.writeText "latexmkrc" config.texShell.latexmk.rc;
            description = "the .latexmkrc file";
          };
          _wrapper = mkOption {
            type = types.functionTo types.package;
            readOnly = true;
            internal = true;
            default = tex: pkgs.symlinkJoin {
              inherit (tex) name;
              nativeBuildInputs = [
                pkgs.makeWrapper
              ];
              paths = [
                tex
              ];
              postBuild = ''
                wrapProgram $out/bin/latexmk --add-flags "-r" --add-flags "${config.texShell.latexmk.rcFile}"
              '';
            };
          };
        };
      };
    };

    config = {
      texShell.extraPackages = mkIf config.texShell.latexmk.enable (ps: [ ps.latexmk ]);

      packages.texShell = let
        wrapper = if config.texShell.latexmk.enable then config.texShell.latexmk._wrapper else x: x;
      in wrapper (config.texShell.scheme.withPackages config.texShell.scheme.extraPackages);

      devShells.texShell = pkgs.makeShell {
        nativeBuildInputs = [
          config.packages.texShell
        ];
      };
    };
  });
}