anchor.diff:        install -D -t $out/share/wallpapers ../"macOS Mojave Wallpapers"/*
       ''}
   
  -    # Replace duplicate files with hardlinks to the first file in each
  +    # Replace duplicate files with soft links to the first file in each
       # set of duplicates, reducing the installed size in about 53%
  -    jdupes -L -r $out/share
  +    jdupes --quiet --link-soft --recurse $out/share
   
       runHook postInstall
     '';
  
positive.code: { lib
  , stdenv
  , fetchFromGitHub
  , fetchurl
  , glib
  
negative.code: lib.checkListOfEnum "${pname}: opacity variants" [ "standard" "solid" ] opacityVariants
  lib.checkListOfEnum "${pname}: theme variants" [ "default" "blue" "purple" "pink" "red" "orange" "yellow" "green" "grey" "all" ] themeVariants
  
  stdenvNoCC.mkDerivation rec {
    inherit pname;
    version = "2022-10-21";
  
    srcs = [
      (fetchFromGitHub {
        owner = "vinceliuice";
        repo = pname;
        rev = version;
        sha256 = "sha256-0OqQXyv/fcbKTzvQUVIbUw5Y27hU1bzwx/0DelMEZIs=";
      })
    ]
    ++
  