e7cd9077a8
According to http://s3sync.net/wiki.html, https://github.com/ms4720/s3sync was supposed to take over the development but nothing has happened in 4 years. The project is unfortunately dead and is our only dependency to ruby 1.8.
To build the manual, you need Nix installed on your system (no need
for NixOS). To install Nix, follow the instructions at
https://nixos.org/nix/download.html
When you have Nix on your system, in the root directory of the project
(i.e., `nixpkgs`), run:
nix-build nixos/release.nix -A manual.x86_64-linux
When this command successfully finishes, it will tell you where the
manual got generated.