NixOS/system/modules/font.nix

{ pkgs, ... }:
{
  fonts = {
    packages = with pkgs;
      [
        # icon fonts
        material-design-icons

        # normal fonts
        noto-fonts
        noto-fonts-cjk
        noto-fonts-emoji
        noto-fonts-color-emoji

        nerdfonts

        # (nerdfonts.override {
        #   fonts = [ "FiraCode" "JetBrainsMono" "Iosevka" ];
        # })
      ];

    # use fonts specified by user rather than default ones
    enableDefaultPackages = false;

    # user defined fonts
    # the reason there's Noto Color Emoji everywhere is to override DejaVu's
    # B&W emojis that would sometimes show instead of some Color emojis
    fontconfig.defaultFonts = {
      serif = [ "Noto Serif" "Noto Color Emoji" ];
      sansSerif = [ "Noto Sans" "Noto Color Emoji" ];
      monospace = [ "JetBrainsMono Nerd Font" "Noto Color Emoji" ];
      emoji = [ "Noto Color Emoji" ];
    };
  };
}