anchor.diff:    hdparm = import ../os-specific/linux/hdparm {
       inherit fetchurl stdenv;
     };
  -
  + 
     htop = import ../os-specific/linux/htop {
   	  inherit fetchurl stdenv ncurses;
     };
  
positive.code:       perl perlArchiveZip perlCompressZlib zlib libjpeg
        expat pkgconfig freetype fontconfig libwpd libxml2
        db4 sablotron curl libsndfile flex zip unzip libmspack
        getopt file neon cairo which icu boost jre jdk ant;
      inherit (xlibs) libXaw;
      inherit (gtkLibs) gtk;
      bison = bison23;
  
negative.code: 
    amsn = import ../applications/networking/instant-messengers/amsn {
      inherit fetchurl stdenv which tcl tk x11;
      libstdcpp = gcc33.gcc;
    };
  
    batik = import ../applications/graphics/batik {
  