anchor.diff:  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 {
  +stdenvNoCC.mkDerivation rec {
     inherit pname;
  -  version = "2022-06-07";
  +  version = "2022-10-21";
   
     srcs = [
       (fetchFromGitHub {
         owner = "vinceliuice";
         repo = pname;
         rev = version;
  -      sha256 = "sha256-OEqB2PSZ5KoxXAUhlyT1PRUzckVz+jTCIoAqP8gVqTk=";
  +      sha256 = "sha256-0OqQXyv/fcbKTzvQUVIbUw5Y27hU1bzwx/0DelMEZIs=";
       })
     ]
     ++
  
positive.code: { lib
  , stdenv
  , fetchFromGitHub
  , fetchurl
  , glib
  
negative.code:       install -D -t $out/share/wallpapers ../"macOS Mojave Wallpapers"/*
      ''}
  
      # Replace duplicate files with soft links to the first file in each
      # set of duplicates, reducing the installed size in about 53%
      jdupes --quiet --link-soft --recurse $out/share
  
      runHook postInstall
    '';
  