There are some fonts that aren’t on nixpkgs. This is my nix flake which adds such fonts to your system. Currently, this flake installs the following fonts:
Each font is available as it’s own package in this flake, with defaultPackage a derivation giving all the listed fonts.
I am choosing not to include the font files in this repository; the flake is set up to download them from their sources, so that there are no licensing issues. This does mean, however, that the flake is subject to link rot. If this does become an issue, I will update the library with the required files.