anchor.diff:  , less
   , libidn
   , ncurses
  -, openssl
  +, openssl_1-0-2
   , readline
   , zlib
   }:
  
positive.code:     "--with-modules"
      #"--with-sysroot"
      "--without-gnutls"
      "--${boolWt (openssl != null)}-openssl${
        boolString (openssl != null) "=${openssl}" ""}"
      "--without-included-regex"
      "--with-libresolv"
      "--${boolWt (readline != null)}-readline${
  
negative.code:     expat
      libidn
      ncurses
      openssl_1-0-2
      readline
      zlib
    ];
  