e64dc25434
This reverts commit 93c54acf97077567e8d6135a36f191e872b26692. This reopens #30517 @nbp @Ma27 Breaking people's config for this is hardly reasonable as is. If it absolutely cannot be avoided, at the very least, we need to provide clear instructions on what people need to upgrade in their config. I actually had to bisect to the commit, to even find out what property I should change or define, as the error message was useless. It didn't even mention a property name. Discussion on the PR seems to be ongoing, so I'm reverting this, so we don't break people's systems on unstable.
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.