anchor.diff:  , openssl
   , perl
   , pkg-config
  +, python3
   , rustPlatform
   , sqlcipher
   , sqlite
  
positive.code:     cargoCheckHook
    ];
  
    meta = with lib; {
      description = "Delta Chat Rust Core library";
      homepage = "https://github.com/deltachat/deltachat-core-rust/";
  
negative.code:   cargoDeps = rustPlatform.fetchCargoTarball {
      inherit src;
      name = "${pname}-${version}";
      hash = "sha256-t1/xztmiuJMqNkIe7cBzO7MaZQb6GtnIX5wxEpC+IFo=";
    };
  
    nativeBuildInputs = [
  