{ fetchurl }:
let version = "1.2.1"; in
fetchurl {
url = "https://logstash.objects.dreamhost.com/release/logstash-${version}-flatjar.jar";
name = "logstash-${version}.jar";
sha256 = "08zfhq6klhkqapqnyzbdikgryd8bj2fp0wdb5d6dawdan5psbf6h";
}