php7-dev.tcz
   libxml2-dev.tcz
      libxml2.tcz
         liblzma.tcz
      liblzma-dev.tcz
         liblzma.tcz
   pcre-dev.tcz
      pcre.tcz
         bzip2-lib.tcz
      bzip2-dev.tcz
         bzip2.tcz
            bzip2-lib.tcz
   readline-dev.tcz
      readline.tcz
         ncurses.tcz
      ncurses-dev.tcz
         ncurses.tcz
   php7-ext.tcz