diff --git a/configuration.nix b/configuration.nix
index ea9bf73..e62a852 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -1,4 +1,5 @@
 {
+  lib,
   config,
   pkgs,
   simintech,
@@ -34,6 +35,52 @@ in
             dontUnpack = true;
             installPhase = "unzip $src; mkdir -p $out;  mv ./${nam}/* $out";
           };
+	ptFiles = pkgs.stdenv.mkDerivation {
+		name = "PacketTracer7drv";
+		version = "7.3.1";
+		dontUnpack = true;
+		src = pkgs.fetchurl {
+			url = "http://kafpi.local/PacketTracer_731_amd64.deb";
+      			hash = "sha256-w5gC0V3WHQC6J/uMEW2kX9hWKrS0mZZVWtZriN6s4n8=";
+    		};
+		nativeBuildInputs = with pkgs; [
+      			dpkg
+			makeWrapper
+    		];
+
+    		installPhase = ''
+    		  dpkg-deb -x $src $out
+    		  makeWrapper "$out/opt/pt/bin/PacketTracer7" "$out/bin/packettracer7" \
+    		      --prefix LD_LIBRARY_PATH : "$out/opt/pt/bin"
+    		'';
+  	};
+		ptFhsEnv = pkgs.buildFHSEnv {
+			name = "packettracer7";
+			runScript = "${ptFiles}/bin/packettracer7 -guest";
+
+			targetPkgs =
+				pkgs: with pkgs; [
+					alsa-lib
+        				dbus
+    					expat
+				        fontconfig
+				        glib
+				        libglvnd
+				        libpulseaudio
+				        libudev0-shim
+				        libxkbcommon
+				        libxml2
+				        libxslt
+				        nspr
+				        nss
+				        xorg.libICE
+				        xorg.libSM
+				        xorg.libX11
+				        xorg.libXScrnSaver
+				      ];
+		  };
+
+
       in
       with pkgs;
       [
@@ -154,7 +201,31 @@ in
         stm32loader
 
         ##### СЕТЕВЫЕ УТИЛИТЫ #######
-        nodePackages.node-red # - лоукод-платформа программирования устройств, в частности интернета вещей
+	(pkgs.stdenv.mkDerivation {
+		pname = "ciscoPacketTracer7";
+		version = "7.3.1";
+		dontUnpack = true;
+		installPhase = ''
+			mkdir $out
+			${pkgs.xorg.lndir}/bin/lndir -silent ${ptFhsEnv} $out
+		'';
+		desktopItems = [ 
+		(pkgs.makeDesktopItem {
+			name = "cisco-pt7.desktop";
+			desktopName = "Cisco Packet Tracer 7";
+			icon = "${ptFiles}/opt/pt/art/app.png";
+			exec = "packettracer7 %f";
+			mimeTypes = [
+				"application/x-pkt"
+				"application/x-pka"
+				"application/x-pkz"
+    			];
+  		})];
+		
+  nativeBuildInputs = [ copyDesktopItems pkgs.xorg.lndir ];
+})
+
+	nodePackages.node-red # - лоукод-платформа программирования устройств, в частности интернета вещей
         httpie httpie-desktop # - передовой клиент HTTP-запросов
         netcat socat          # - низкоуровневые простейшие утилиты установления TCP или UDP между компьютерами или с ПЛК
         opcua-client-gui      # - простой графический клиент OPC UA
@@ -163,6 +234,61 @@ in
 
         logisim-evolution
         unityhub # UnityHub - 3D-моделирование, визуализация, геймдев, AR/VR
+        (pkgs.stdenv.mkDerivation rec {
+		pname = "cnc_vmc_sim";
+		version = "1.0.0-share";
+                src = builtins.fetchTarball {
+ 			url = "http://kafpi.local/linux_cnc_vmc_share.tar.xz";
+			sha256 = "sha256:1hjkm2wq6dfmddb2van1q8hdvf41bp4snslcbkj0b1myi3zpi1md";
+                };
+
+		installPhase = ''
+			runHook preInstall
+			mkdir -p $out/bin
+			mkdir -p $out/share/applications
+			mkdir -p $out/share/icons
+			cp ${src}/icon.png $out/share/icons/${pname}.png
+			cp ${fhsEnv}/bin/${pname}-fhs $out/bin/${pname}
+			cp ${desktopItem}/share/applications/*.desktop $out/share/applications
+		'';
+
+		fhsEnv = pkgs.buildFHSEnv {
+			name = "${pname}-fhs";
+			targetPkgs = p: with p; [
+				eudev.out
+				libGL.out
+				openal.out
+				xorg.libX11.out
+			];
+			runScript = "${src}/${pname}";
+		};
+
+		desktopItem = pkgs.makeDesktopItem {
+			name = "CNC VMC (free)";
+			exec = "${pname}";
+			desktopName = "CNC VMC (free)";
+			categories = [ "Development" ];
+			icon = "${pname}";
+			terminal = false;
+			startupNotify = false;
+		};
+	})
+	(pkgs.stdenv.mkDerivation rec {
+		pname = "ramus";
+		version = "0.1.3";
+		src = builtins.fetchTarball {
+			url = "http://10.0.174.12:30000/ramus.tar.xz";
+			sha256 = "sha256:1a9fha7zwyyag0q4glk58pzigqdczshxpnax7cdzg1bry4aw6f9d";
+		};
+		installPhase = ''
+			sed -e "s~ramus.ico~$out/share/icons/ramus.ico~;" -i share/applications/ramus.desktop
+			mkdir $out
+			cp -r share bin lib $out
+			echo "JDK_JAVA_OPTIONS='-Dawt.useSystemAAFontSettings=on -Dswing.aatext=true -Dswing.defaultlaf=com.sun.java.swing.plaf.gtk.GTKLookAndFeel' ${pkgs.jre8}/bin/java -jar $out/bin/ramus-startup.jar" > $out/bin/ramus
+			chmod +x $out/bin/ramus
+		'';
+	})
+
 
         # поставка SimInTech. Кодогенерация библиотек для ПК работает,
         # но несовместима с .dll из windows!
@@ -253,11 +379,13 @@ in
   time.hardwareClockInLocalTime = hasBootPartition;
 
   # настройки Nix
-  nixpkgs.config.allowUnfree = true;
+  nixpkgs.config = {
+    allowUnfree = true;
+    nvidia.acceptLicense = true;
+  };
   nix.settings = {
     substituters = [
        "https://cache.nixos.org"
-       "http://10.0.174.12:5000"
     ];
     trusted-public-keys = ["kafpi.local:PttR9S1eDyint3v0LCp5zfBGG+xfxzQ+cxKAQARNpyw="];
     auto-optimise-store = true;
@@ -270,15 +398,37 @@ in
   hardware.graphics = {
     enable = true;
     enable32Bit = true;
+    extraPackages = with pkgs; [ nvidia-vaapi-driver ];
   };
   services.xserver = {
     enable = true;
+    videoDrivers = [
+      "nvidia"
+      "modesetting"
+      "fbdev"
+    ];
     xkb.layout = "us,ru";
     xkb.options = "grp:alt_shift_toggle";
   };
+  hardware.enableAllFirmware = true;
+  hardware.nvidia = {
+     package = config.boot.kernelPackages.nvidiaPackages.legacy_470;
+     modesetting.enable = true;
+     powerManagement.enable = true;
+     open = false;
+     nvidiaSettings = false;
+  };
+  boot.blacklistedKernelModules = [ "nouveau" ];
+  boot.extraModprobeConfig = "options nvidia " + lib.concatStringsSep " " [
+  	"NVreg_UsePageAttributeTable=1"
+	"NVreg_EnablePCIeGen3=1"
+	"NVreg_RegistryDwords=RMUseSwI2c=0x01;RMI2cSpeed=100"
+  ];
+  
   services.displayManager.autoLogin.user = "student";
   services.getty.autologinUser = "student";
   services.xserver.displayManager.lightdm.enable = true;
+  services.xserver.displayManager.startx.enable = true;
   services.displayManager.defaultSession = "MIREA-WindowsLike+Metacity";
   services.xserver.displayManager.session = [
     {