{
  pkgs,
  ...
}:
{
  #
  # fonts
  #
  fonts.fontconfig = {
    enable = true;
    defaultFonts = {
      sansSerif = [
        "Ubuntu"
        "Noto Sans CJK TC"
      ];
      serif = [ "Noto Serif CJK TC" ];
      monospace = [ "Iosevka" ];
      emoji = [ "Noto Color Emoji" ];
    };

    configFile = {
      thick-iosevka = {
        enable = true;
        # https://www.freedesktop.org/software/fontconfig/fontconfig-user.html
        # https://gist.github.com/yuttie/adb22a6c07ef8e75d82e48d5484b7ad8
        # https://github.com/N1k3YB/CS2FontChanger_ru/blob/5f1d8189220f42286d773c536ff83a49b2556da2/app.py#L227
        #
        # Use the following script to test
        # for size in (seq 9 15)
        #     echo
        #     echo
        #     for weight in {regular,medium,bold}
        #         echo "weight=$weight:size=$size"
        #         fc-match "mono:weight=$weight:size=$size"
        #     end
        # end | less
        text = /* xml */ ''
          <?xml version="1.0"?>
          <!DOCTYPE fontconfig SYSTEM "urn:fontconfig:fonts.dtd">
          <fontconfig>
            <match target="pattern">
              <test name="family" compare="contains"><string>Iosevka</string></test>
              <edit name="weight" mode="assign" binding="strong">
                <if> <eq><name>weight</name><const>bold</const></eq> <!-- then --> <const>bold</const>
                  <if> <eq><name>weight</name><const>medium</const></eq> <!-- then --> <const>medium</const>
                    <!-- not bold nor medium -->
                    <if> <more><name>size</name><double>15</double></more> <!-- then --> <const>regular</const>
                      <if> <more><name>size</name><double>10</double></more> <!-- then --> <const>medium</const>
                        <!-- else --> <const>bold</const>
                      </if>
                    </if>
                  </if>
                </if>
              </edit>
            </match>
          </fontconfig>
        '';
      };
    };
  };
  home.packages = [
    pkgs.noto-fonts
    pkgs.noto-fonts-lgc-plus
    pkgs.noto-fonts-cjk-sans
    pkgs.noto-fonts-cjk-serif
    pkgs.noto-fonts-color-emoji
    pkgs.noto-fonts-emoji-blob-bin
    pkgs.ubuntu-classic
    pkgs.Iosevka
  ];

  home.file = {
    ".xscreensaver".source = "${./xscreensaver/.xscreensaver}";
    ".wallpaper".source = "${pkgs.wallpapers.packages.serial_experiments_lain.lain_windows_error}";
  };
  xdg.configFile = {
    "xmonad".source = "${./xmonad}";
  };
  home.pointerCursor = {
    x11.enable = true;
    gtk.enable = true;
    name = "Posy_Cursor_Black";
    package = pkgs.posy-cursors;
    size = 72;
  };
  xresources.properties."Xft.dpi" = 150;
  i18n.inputMethod = {
    enable = true;
    type = "fcitx5";
  };

  xdg.mimeApps =
    let
      associations = {
        "x-scheme-handler/mailto" = [ "org.gnome.Evolution.desktop" ];
      };
    in
    {
      enable = true;
      associations.added = associations;
      defaultApplications = associations;
    };
}