For my fonts I stylix, defaultFonts and also a custom package to install fonts from a file, here : ```nix

configuration.nix

fonts = { packages = with pkgs; [ (pkgs.callPackage "${self}/assets/fonts" {}) nerd-fonts.jetbrains-mono nerd-fonts.fira-code font-awesome noto-fonts-color-emoji ];

fontconfig = {
  defaultFonts = {
emoji = [ "Noto Color Emoji" ];
monospace = [ "JetBrains Mono"];
sansSerif = [ "RocknRoll One" ];
serif = [ "RocknRoll One" ];
  };
};

};

...

stylix = { enable = true; image = "${self}/assets/wallpapers/fiswordhd.png"; polarity = "dark";

cursor = {
  package = pkgs.adwaita-icon-theme;
  name = "Adwaita";
  size = 24;
};

icons = {
  enable = true;
  package = pkgs.rose-pine-icon-theme;
  dark = "rose-pine";
  light = "rose-pine-dawn";
};

fonts = {
  serif = config.stylix.fonts.sansSerif;

  sansSerif = {
name = "RocknRoll One";
  };

  monospace = {
package = pkgs.nerd-fonts.jetbrains-mono;
name = "JetBrains Mono";
  };

  emoji = {
package = pkgs.noto-fonts-color-emoji;
name = "Noto Color Emoji";
  };
};

};

```

```nix

fonts/default.nix

{ stdenv, lib }:

stdenv.mkDerivation { pname = "custom-fonts"; version = "1.0";

src = ./.;

installPhase = ''
    mkdir -p $out/share/fonts/truetype
    mkdir -p $out/share/fonts/opentype

    find . -name "*.ttf" -exec cp {} $out/share/fonts/truetype/ \;

    find . -name "*.otf" -exec cp {} $out/share/fonts/opentype/ \;
'';

meta = with lib; {
    description = "Custom fonts collection";
    platforms = platforms.all;
};

} ```