anchor.diff:    installPhase = ''
       runHook preInstall
   
  -    name= ./install.sh --theme all --dest $out/share/themes
  +    name= ./install.sh \
  +      ${lib.optionalString (buttonSizeVariants != []) "--small " + builtins.toString buttonSizeVariants} \
  +      ${lib.optionalString (buttonVariants != []) "--alt " + builtins.toString buttonVariants} \
  +      ${lib.optionalString (colorVariants != []) "--color " + builtins.toString colorVariants} \
  +      ${lib.optionalString (opacityVariants != []) "--opacity " + builtins.toString opacityVariants} \
  +      ${lib.optionalString (themeVariants != []) "--theme " + builtins.toString themeVariants} \
  +      --dest $out/share/themes
   
  -    install -D -t $out/share/wallpapers ../"macOS Mojave Wallpapers"/*
  +    ${lib.optionalString wallpapers ''
  +      install -D -t $out/share/wallpapers ../"macOS Mojave Wallpapers"/*
  +    ''}
   
       # Replace duplicate files with hardlinks to the first file in each
       # set of duplicates, reducing the installed size in about 53%
  
positive.code:       rev = "c148646ccab382f7a2d5fdc421fc32d843cb4172";
        sha256 = "sha256-h4MSSh8cu9M81bM+WJSyl1SQ7CVth1DvjIVOUJXqpxs";
      })
      (fetchurl {
        url = "https://github.com/vinceliuice/Mojave-gtk-theme/raw/11741a99d96953daf9c27e44c94ae50a7247c0ed/macOS_Mojave_Wallpapers.tar.xz";
        sha256 = "18zzkwm1kqzsdaj8swf0xby1n65gxnyslpw4lnxcx1rphip0rwf7";
      })
    ];
  
    sourceRoot = "source";
  
  
negative.code: , optipng
  , sassc
  , which
  , buttonSizeVariants ? [] # default to standard
  , buttonVariants ? [] # default to all
  , colorVariants ? [] # default to all
  , opacityVariants ? [] # default to all
  , themeVariants ? [] # default to MacOS blue
  , wallpapers ? false
  }:
  
  let
    pname = "mojave-gtk-theme";
  in
  lib.checkListOfEnum "${pname}: button size variants" [ "standard" "small" ] buttonSizeVariants
  lib.checkListOfEnum "${pname}: button variants" [ "standard" "alt" ] buttonVariants
  lib.checkListOfEnum "${pname}: color variants" [ "light" "dark" ] colorVariants
  lib.checkListOfEnum "${pname}: opacity variants" [ "standard" "solid" ] opacityVariants
  lib.checkListOfEnum "${pname}: theme variants" [ "default" "blue" "purple" "pink" "red" "orange" "yellow" "green" "grey" "all" ] themeVariants
  
  stdenv.mkDerivation rec {
    inherit pname;
    version = "unstable-2021-12-20";
  
    srcs = [
  