anchor.diff:  
     nativeBuildInputs = [ cmake ];
   
  -  outputs = [ "out" "dev"];
  +  outputs = [ "out" "dev" ];
   
     buildInputs = [ openssl ]; # s2n-config has find_dependency(LibCrypto).
   
  
positive.code: { lib, stdenv
  , fetchFromGitHub
  , cmake
  , openssl
  }:
  
  stdenv.mkDerivation rec {
  
negative.code:     done
    '';
  
    passthru.tests = {
      inherit nix;
    };
  
    meta = with lib; {
      description = "C99 implementation of the TLS/SSL protocols";
      homepage = "https://github.com/aws/s2n-tls";
  