diff --git a/nixos/boxes/foryog/default.nix b/nixos/boxes/foryog/default.nix
index 39db3dca..dafc046d 100644
--- a/nixos/boxes/foryog/default.nix
+++ b/nixos/boxes/foryog/default.nix
@@ -5,7 +5,6 @@
     ./hardware-configuration.nix
     ../../backups.nix
     ../../boot.nix
-    ../../gfx-intel-dri2.nix
     ../../git
     ../../gnome
     ../../gui
@@ -32,10 +31,6 @@
 
   time.timeZone = "Europe/London";
 
-  virtualisation.kvmgt = {
-    enable = true;
-    device = "0000:00:02.0";
-  };
   hardware.trackpoint.enable = true;
 
   services.xserver = {
diff --git a/nixos/boxes/foryog/hardware-configuration.nix b/nixos/boxes/foryog/hardware-configuration.nix
index a3986d72..6df72b45 100644
--- a/nixos/boxes/foryog/hardware-configuration.nix
+++ b/nixos/boxes/foryog/hardware-configuration.nix
@@ -1,16 +1,11 @@
-{
-  config,
-  lib,
-  pkgs,
-  inputs,
-  ...
-}: {
+{ config, lib, pkgs, inputs, ... }: {
   boot = {
-    kernelModules = ["kvm-intel"];
+    kernelModules = [ "kvm-intel" ];
 
     initrd = {
-      kernelModules = ["dm-snapshot"];
-      availableKernelModules = ["xhci_pci" "nvme" "usbhid" "usb_storage" "sd_mod"];
+      kernelModules = [ "dm-snapshot" ];
+      availableKernelModules =
+        [ "xhci_pci" "nvme" "usbhid" "usb_storage" "sd_mod" ];
     };
 
     loader.systemd-boot.enable = true;
@@ -18,8 +13,9 @@
     loader.efi.efiSysMountPoint = "/boot/efi";
   };
 
-  boot.initrd.secrets = {"/crypto_keyfile.bin" = null;};
-  boot.initrd.luks.devices."luks-43a80125-4089-45be-9561-fab93f984916".device = "/dev/disk/by-uuid/43a80125-4089-45be-9561-fab93f984916";
+  boot.initrd.secrets = { "/crypto_keyfile.bin" = null; };
+  boot.initrd.luks.devices."luks-43a80125-4089-45be-9561-fab93f984916".device =
+    "/dev/disk/by-uuid/43a80125-4089-45be-9561-fab93f984916";
 
   fileSystems."/boot/efi" = {
     device = "/dev/disk/by-uuid/D6C0-1A9D";
@@ -29,13 +25,8 @@
   fileSystems."/" = {
     device = "/dev/disk/by-uuid/98f3597c-183a-45fb-b2a4-b598c18d089a";
     fsType = "btrfs";
-    options = ["subvol=@"];
+    options = [ "subvol=@" ];
   };
 
-  swapDevices = [];
-
-  nix.settings = {
-    max-jobs = 7;
-    cores = 4;
-  };
+  swapDevices = [ ];
 }
diff --git a/nixos/boxes/foryog/lte-modem.nix b/nixos/boxes/foryog/lte-modem.nix
deleted file mode 100644
index 9b0f4df2..00000000
--- a/nixos/boxes/foryog/lte-modem.nix
+++ /dev/null
@@ -1,9 +0,0 @@
-{
-  config,
-  pkgs,
-  ...
-}: {
-  environment.systemPackages = with pkgs; [libqmi];
-  boot.extraModulePackages = with pkgs; [libqmi];
-  boot.kernelModules = ["qmi_wwan" "qcserial"];
-}
diff --git a/nixos/boxes/foryog/modem.sh b/nixos/boxes/foryog/modem.sh
deleted file mode 100644
index 849fa0cf..00000000
--- a/nixos/boxes/foryog/modem.sh
+++ /dev/null
@@ -1,105 +0,0 @@
-#!/usr/bin/env bash
-
-###
-# This script automate the setup of QMI supported wwan devices.
-#
-# Tested on following environment:
-#   * Lenovo ThinkPad X220 (4286-CTO)
-#   * Gentoo/Linux, Linux Kernel 3.9.6
-#   * NTT Docomo UIM card (Xi LTE SIM)
-#   * Sierra Wireless, Inc. Gobi 3000 wireless wan module
-#     (FRU 60Y3257, vendor and device id is 1199:9013)
-#     memo:
-#       I recommend to check if your wwan module works fine
-#       for your mobile broadband provider with Windows
-#       especially if you imported the device from other country.
-#       You may have to initialize your device for your region.
-#   * Required kernel config (other modules may be also required):
-#     - qmi_wwan (CONFIG_USB_NET_QMI_WWAN)
-#     - qcserial (CONFIG_USB_SERIAL_QUALCOMM)
-#   * Required settings:
-#     - you may have to create /etc/qmi-network.conf.
-#       My qmi-network.conf has only a line "APN=mopera.net".
-#
-
-# your wwan device name created by qmi_wwan kernel module
-# check it with "ip a" or "ifconfig -a". it may be wwan0?
-WWAN_DEV=wwp0s29u1u4
-# your cdc_wdm modem location
-CDC_WDM=/dev/cdc-wdm0
-# this script uses following qmi commands
-QMICLI=/usr/bin/qmicli
-QMI_NETWORK=/usr/bin/qmi-network
-# the places of following commands vary depending on your distribution
-IFCONFIG=/bin/ifconfig
-DHCPCD=/sbin/dhcpcd
-SUDO=/usr/bin/sudo
-
-function helpmsg {
-  echo "usage: $0 {start|stop|restart|status}"
-  exit 1
-}
-
-function qmi_start {
-  $COMMAND_PREFIX $IFCONFIG $WWAN_DEV up
-  $COMMAND_PREFIX $QMICLI -d $CDC_WDM --dms-set-operating-mode=online
-  if [ $? -ne 0 ]; then
-    echo "your wwan device may be RFKilled?"
-    exit 1
-  fi
-  $COMMAND_PREFIX $QMI_NETWORK $CDC_WDM start
-  $COMMAND_PREFIX $DHCPCD $WWAN_DEV
-}
-
-function qmi_stop {
-  $COMMAND_PREFIX $QMI_NETWORK $CDC_WDM stop
-  $COMMAND_PREFIX kill `cat /var/run/dhcpcd-${WWAN_DEV}.pid`
-  $COMMAND_PREFIX $IFCONFIG $WWAN_DEV down
-}
-
-function qmi_strength {
-  dbm=`$COMMAND_PREFIX $QMICLI -d $CDC_WDM --nas-get-signal-strength | tr "'" " " | grep Network | head -1 | awk '{print $4}'`
-  echo -n "Signal strength is "
-  if [ $dbm -ge -73 ]; then
-    echo -n 'Excellent'
-  elif [ $dbm -ge -83 ]; then
-    echo -n 'Good'
-  elif [ $dbm -ge -93 ]; then
-    echo -n 'OK'
-  elif [ $dbm -ge -109 ]; then
-    echo -n 'Marginal'
-  else
-    echo Unknown
-  fi
-  echo " (${dbm} dBm)"
-}
-
-function qmi_status {
-  $COMMAND_PREFIX $QMI_NETWORK $CDC_WDM status
-  qmi_strength
-}
-
-# check argument number
-if [ $# -ne 1 ]
-then
-  helpmsg
-fi
-
-# check permission
-if [ `whoami` != 'root' ]
-then
-  echo "warning: root permission required. setting command prefix to 'sudo'."
-  COMMAND_PREFIX=$SUDO
-fi
-
-# run commands
-case $1 in
-  start) qmi_start ;;
-  stop) qmi_stop ;;
-  restart) qmi_stop; qmi_start ;;
-  status) qmi_status ;;
-  *) helpmsg ;;
-esac
-
-
-
diff --git a/nixos/boxes/foryog/nvidia.nix b/nixos/boxes/foryog/nvidia.nix
deleted file mode 100644
index da12f86c..00000000
--- a/nixos/boxes/foryog/nvidia.nix
+++ /dev/null
@@ -1,30 +0,0 @@
-{pkgs, ...}: let
-  nvidia-offload = pkgs.writeShellScriptBin "nvidia-offload" ''
-    export __NV_PRIME_RENDER_OFFLOAD=1
-    export __NV_PRIME_RENDER_OFFLOAD_PROVIDER=NVIDIA-G0
-    export __GLX_VENDOR_LIBRARY_NAME=nvidia
-    export __VK_LAYER_NV_optimus=NVIDIA_only
-    exec -a "$0" "$@"
-  '';
-  whichgpu = pkgs.writeShellScriptBin "whichgpu" "glxinfo | grep vendor";
-  nvidiaon = pkgs.writeShellScriptBin "nvidiaon" ''
-    export __NV_PRIME_RENDER_OFFLOAD=1;
-    export __NV_PRIME_RENDER_OFFLOAD_PROVIDER=NVIDIA-G0;
-    export __GLX_VENDOR_LIBRARY_NAME=nvidia;
-    export __VK_LAYER_NV_optimus=NVIDIA_only;
-    glxinfo | grep vendor; echo OK!;
-  '';
-in {
-  environment.systemPackages = [nvidia-offload whichgpu nvidiaon];
-  hardware.opengl.enable = true;
-  hardware.opengl.driSupport32Bit = true;
-  hardware.opengl.extraPackages32 = with pkgs.pkgsi686Linux; [libva];
-  services.xserver.videoDrivers = ["nvidia"];
-  hardware.nvidia.prime = {
-    offload.enable = true;
-    # Bus ID of the Intel GPU. You can find it using lspci, either under 3D or VGA
-    intelBusId = "PCI:0:2:0";
-    # Bus ID of the NVIDIA GPU. You can find it using lspci, either under 3D or VGA
-    nvidiaBusId = "PCI:1:0:0";
-  };
-}