e3ab0826c2
This removes our hardcoded presets which weren't updated for quite some time. Infinality now has new hardcoded presets in freetype, which can be overriden if desired with environment variables (as before). Accordingly, updated NixOS module to set the hardcoded preset. Additionally used a more "right" type for substitutions.
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.