anchor.diff:  #
     libpaper = callPackage ../development/libraries/libpaper { };
   #
  -libstartup_notification = callPackage ../development/libraries/startup-notification { };
  +libstartup_notification =
  +  callPackage ../development/libraries/startup-notification { };
   #
     libtxc_dxtn_s2tc = callPackage ../development/libraries/libtxc_dxtn_s2tc { };
   #
  
positive.code: #
    docbook5 = callPackage ../data/sgml+xml/schemas/docbook-5.0 { };
  
    docbook_sgml_dtd_31 = callPackage ../data/sgml+xml/schemas/sgml-dtd/docbook/3.1.nix { };
  
    docbook_sgml_dtd_41 = callPackage ../data/sgml+xml/schemas/sgml-dtd/docbook/4.1.nix { };
  
    docbook_xml_dtd_412 = callPackage ../data/sgml+xml/schemas/xml-dtd/docbook/4.1.2.nix { };
  
    docbook_xml_dtd_42 = callPackage ../data/sgml+xml/schemas/xml-dtd/docbook/4.2.nix { };
  
    docbook_xml_dtd_43 = callPackage ../data/sgml+xml/schemas/xml-dtd/docbook/4.3.nix { };
  #
    docbook_xml_dtd_44 = callPackage ../data/sgml+xml/schemas/xml-dtd/docbook/4.4.nix { };
  #
    docbook_xml_dtd_45 = callPackage ../data/sgml+xml/schemas/xml-dtd/docbook/4.5.nix { };
  #
    freefont_ttf = callPackage ../data/fonts/freefont-ttf { };
  #
    meslo-lg = callPackage ../data/fonts/meslo-lg {};
  #
    mobile_broadband_provider_info = callPackage ../data/misc/mobile-broadband-provider-info { };
  #
    sound-theme-freedesktop = callPackage ../data/misc/sound-theme-freedesktop { };
  #
    unifont = callPackage ../data/fonts/unifont { };
  #
  
negative.code: #
  cfitsio = callPackage ../development/libraries/cfitsio { };
  
    fontconfig-ultimate =
      callPackage ../development/libraries/fontconfig-ultimate { };
  #
    makeFontsConf =
      let
  