anchor.diff:    };
   
     patches = [
  +    # Fix undeclared gio-unix-2.0 in example program.
       (fetchpatch {
         url = "https://gitlab.gnome.org/GNOME/gtk-vnc/commit/8588bc1c8321152ddc5086ca9b2c03a7f511e0d0.patch";
         sha256 = "0i1iapsbngl1mhnz22dd73mnzk68qc4n51pqdhnm18zqc8pawvh4";
  
positive.code:   buildInputs = [
      gnutls
      cairo
      glib
      libgcrypt
      cyrus_sasl
  
negative.code: 
    passthru = {
      updateScript = gnome3.updateScript {
        packageName = pname;
        versionPolicy = "none";
      };
    };
  