7b78f0f098
Systemd upstream has deprecated CriticalConnection with v244 in favor of KeepConnection as that seems to be more flexible: The CriticalConnection= setting in .network files is now deprecated, and replaced by a new KeepConfiguration= setting which allows more detailed configuration of the IP configuration to keep in place.
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.