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