d206f2304f
This makes ~2.5x speed up of an empty container instantiate, hence reduces rebuild time of system with many declarative containers. Note that this doesn't affect production systems much, becaseu those most likely already include `minimal.nix` profile.
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.