anchor.diff: -{ lib, stdenv, fetchFromGitHub, cmake, openssl }:
  +{ lib, stdenv
  +, fetchFromGitHub
  +, fetchpatch
  +, cmake
  +, openssl
  +}:
   
   stdenv.mkDerivation rec {
     pname = "s2n-tls";
  
positive.code:     rev = "v${version}";
      sha256 = "sha256-6XqBpNURU8fzGkTt4jsijgMiOkzMebmLmPAq8yQsTg4=";
    };
  
    nativeBuildInputs = [ cmake ];
  
  
negative.code:   propagatedBuildInputs = [ openssl ]; # s2n-config has find_dependency(LibCrypto).
  
    postInstall = ''
      # Glob for 'shared' or 'static' subdir
      for f in $out/lib/s2n/cmake/*/s2n-targets.cmake; do
        substituteInPlace "$f" \
          --replace 'INTERFACE_INCLUDE_DIRECTORIES "''${_IMPORT_PREFIX}/include"' 'INTERFACE_INCLUDE_DIRECTORIES ""'
      done
    '';
  
    meta = with lib; {
  