https://github.com/angt/secret/archive/v0.11.tar.gz
https://github.com/angt/argz/archive/eb8b122247bd48b11984ae4f8755ae6a4059e6c2.tar.gz argz
https://github.com/jedisct1/libhydrogen/archive/a4de6e098b5bbbd5389eb8058130f782b53826c3.tar.gz libhydrogen