anchor.diff:    '';
   
     passthru = {
  +    libdir = "${self}/lib/mutter-6";
  +
  +    tests = {
  +      libdirExists = runCommand "mutter-libdir-exists" {} ''
  +        if [[ ! -d ${self.libdir} ]]; then
  +          echo "passthru.libdir should contain a directory, “${self.libdir}” is not one."
  +          exit 1
  +        fi
  +        touch $out
  +      '';
  +    };
  +
       updateScript = gnome3.updateScript {
         packageName = pname;
         attrPath = "gnome3.${pname}";
  
positive.code: , wayland-protocols
  }:
  
  stdenv.mkDerivation rec {
    pname = "mutter";
    version = "3.36.3";
  
  
negative.code: { fetchurl
  , fetchpatch
  , substituteAll
  , runCommand
  , stdenv
  , pkgconfig
  , gnome3
  