anchor.diff:  { stdenv, fetchFromGitHub, meson, ninja, gettext, python3,
     pkgconfig, libxml2, json-glib , sqlite, itstool, librsvg,
  -  vala, gnome3, desktop-file-utils, wrapGAppsHook, gobject-introspection
  +  vala, gtk3, gnome3, desktop-file-utils, wrapGAppsHook, gobject-introspection
   }:
   
   stdenv.mkDerivation rec {
  
positive.code: 
        Font Manager is NOT a professional-grade font management solution.
      '';
      license = stdenv.lib.licenses.gpl3;
      repositories.git = https://github.com/FontManager/master;
      platforms = stdenv.lib.platforms.unix;
      maintainers = [ stdenv.lib.maintainers.romildo ];
    };
  }
  
negative.code:     vala
      gnome3.yelp-tools
      wrapGAppsHook
      # For https://github.com/FontManager/master/blob/master/lib/unicode/meson.build
      gobject-introspection
    ];
  
  