anchor.diff:        openssl
       ];
   
  +  # flag added because without end-to-end testing is ran which requires
  +  # additional tooling and servers to test
     cargoTestFlags = [ "--lib" ];
   
     postInstall = lib.optionalString enableCompletions ''
  
positive.code:   '';
  
    meta = with lib; {
      description = "CLI email client written in Rust";
      homepage = "https://github.com/soywod/himalaya";
      changelog = "https://github.com/soywod/himalaya/blob/v${version}/CHANGELOG.md";
      license = licenses.bsdOriginal;
  
negative.code: 
  rustPlatform.buildRustPackage rec {
    pname = "himalaya";
    version = "0.5.9";
  
    src = fetchFromGitHub {
      owner = "soywod";
      repo = pname;
      rev = "v${version}";
      sha256 = "sha256-g+ySsHnJ4FpmJLEjlutuiJmMkKI3Jb+HkWi1WBIo1aw=";
    };
  
    cargoSha256 = "sha256-NkkONl57zSilElVAOXUBxWnims4+EIVkkTdExbeBAaQ=";
  
    nativeBuildInputs = lib.optionals enableCompletions [ installShellFiles ]
      ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ pkg-config ];
  