CVE-2018-16470: https://seclists.org/oss-sec/2018/q4/128 CVE-2018-16471: https://seclists.org/oss-sec/2018/q4/129
No successful hydra build since 2018-02-14. The build fails in the ruby gem json-1.8.3, which we cannot mark directly as broken in nixpkgs, so we mark this as broken.