anchor.diff:  , fetchurl
   , perl
   
  +, brotli
   , c-ares
   , krb5_lib
   , libidn2
  
positive.code:   ];
  
    buildInputs = [
      c-ares
      nghttp2_lib
      openssl
  
negative.code:     "--enable-libcurl_option"
      "--${if stdenv.cc.cc.isGNU then "enable" else "disable"}-libgcc"
      "--with-zlib"
      "--with-brotli"
      "--enable-ipv4"
      "--with-gssapi"
      "--without-winssl"
  