anchor.diff:  
     # ================ START automatically generated code ================
            # WARNING: automatically generated CODE
  -         # This section has been generated by gem nix sup chronic rubygems-update xrefresh-server rb-inotify jeweler
  +         # This section has been generated by gem nix sup chronic rubygems-update xrefresh-server rb-inotify jeweler ncursesw
            # the gem nix command has been added by a nix patch to ruby gems
         
     json_pure_1_2_4 = rubyDerivation {
  
positive.code: 
                for prog in $out/bin/*; do
                  wrapProgram "$prog" \
                    --prefix RUBYLIB : "$RUBYLIB" \
                    --prefix GEM_PATH : "$GEM_PATH" \
                    --set RUBYOPT 'rubygems'
                done
  
negative.code:     # either the nameNoVersion or name must match
      patches = {
        sup = {
          buildInputs = [ pkgs.ncurses pkgs.xapianBindings libs.ncursesw ];
        };
        ncurses = { buildInputs = [ pkgs.ncurses ]; };
        ncurses = { buildInputs = [ pkgs.ncurses ]; };
        nokogiri = {
          buildFlags=["--with-xml2-dir=${pkgs.libxml2} --with-xml2-include=${pkgs.libxml2}/include/libxml2"
  