91c65721f7
pkgs.owncloud still pointed to owncloud 7.0.15 (from May 13 2016) Last owncloud server update in nixpkgs was in Jun 2016. At the same time Nextcloud forked away from it, indicating users switched over to that. cc @matej (original maintainer)
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.