{
  myConfig = {
    essentials = {
      # !!! replace it with your own, else system might malfunction.
      Username = "kenji";
    };
    general = {
      Terminal = {
        font = "JetBrainsMono Nerd Font";
        size = "18";
        shell = "fish"; # or zsh
        aliases = {};
      };
      allowUnfree = true;
    };

    nixos = {
      Hostname = "hakase";
      Timezone = "America/Chicago";
      enableSteamOS = true;

      Boot = {
        mode = "systemd"; # systemd or grub
      };
      Apps = {
        packages = pkgs:
          with pkgs; [
            jellyfin-media-player
            usbutils
            pciutils
            goverlay
            geekbench_6
            gparted
            ntfs3g
            todoist
            feishin
            discord
            xfce.thunar
          ];
      };
      Hyprland = {
        enable = false;
        monitors = [
          "DP-1, highres@165,0x1080,1,vrr,1"
          "DP-2, highres@highrr,0x0,1"
          "HDMI-A-1, 1920x1080@120, 20000x20000,1"
          # "HDMI-A-1, disabled"
        ];
      };
      Git = {
        user = "";
        email = "";
        defaultBranch = "master";
      };
    };
    optionals = {
      Builds = {
        trustedUsers = [
          "@groups"
        ];
        buildMachines = [
          {
            hostName = "";
            sshUser = "";
            sshKey = "";
            system = "";
            supportedFeatures = ["big-parallel" "kvm" "nixos-test"];
          }
        ];
      };
      Ssh = {
        extraConfig = ''
          Host macair
            User biscuit
            HostName 192.168.68.81

          Host gitea.sakamoto.dev
            User kenji
            ProxyCommand cloudflared access ssh --hostname %h
            HostName gitea.sakamoto.dev
        '';
      };
    };
  };
}