{ lib, config, pkgs, ... }:
arg:
with lib;
let cfg = config.colorscheme;

    getKittyTheme = with builtins; (theme:
        let matching = filter (x: x.name == theme)
            (fromJSON
              (readFile
                "${pkgs.kitty-themes}/share/kitty-themes/themes.json"));

         in throwIf (length matching == 0)
            "kitty-themes does not contain a theme named ${theme}"
            "${pkgs.kitty-themes}/share/kitty-themes/${(head matching).file}");

    unwrapKittyTheme = with pkgs; path: let
      theme = runCommand "theme.toml" { nativebuildinputs = [ coreutils ]; } ''
          cat '${path}' | sed -E '/^#|^$/d;s/\s+(.*)/ = "\1"/g' > $out
          '';
    in (builtins.fromTOML (builtins.readFile theme));

in unwrapKittyTheme (getKittyTheme arg)