anchor.diff:      };
     };
   
  -  inherit (pkgs.lib) mkIf;
   in
   
   {
  
positive.code:           pkgs.xorg.fontmiscmisc
            pkgs.xorg.fontcursormisc
          ]
          ++ pkgs.lib.optional config.fonts.enableCoreFonts pkgs.corefonts
          ++ pkgs.lib.optional config.fonts.enableGhostscriptFonts "${pkgs.ghostscript}/share/ghostscript/fonts"
          ++ config.fonts.extraFonts;
        };
  
  
negative.code:         ";
        };
  
        # Should be moved elsewhere.
        enableGhostscriptFonts = mkOption {
          default = false;
          description = "
  