diff --git a/configuration.nix b/configuration.nix
index 0dc85b2..97d2e38 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -13,5 +13,5 @@
   # this value at the release version of the first install of this system.
   # Before changing this value read the documentation for this option
   # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
-  system.stateVersion = "20.09"; # Did you read the comment?
+  system.stateVersion = "21.11"; # Did you read the comment?
 }
diff --git a/hardware/hardware-configuration-desktop.nix b/hardware/hardware-configuration-desktop.nix
index 098c0ed..698369a 100644
--- a/hardware/hardware-configuration-desktop.nix
+++ b/hardware/hardware-configuration-desktop.nix
@@ -19,7 +19,7 @@
     };
 
   fileSystems."/boot" =
-    { device = "/dev/disk/by-uuid/6456-8B97";
+    { device = "/dev/disk/by-uuid/0DD8-8BF6";
       fsType = "vfat";
     };
 
diff --git a/roles/subroles/reversing.nix b/roles/subroles/reversing.nix
new file mode 100644
index 0000000..f6403fa
--- /dev/null
+++ b/roles/subroles/reversing.nix
@@ -0,0 +1,8 @@
+{ config, pkgs, ... }:
+{
+  environment.systemPackages = with pkgs; [
+    radare2
+    ghidra-bin
+    gdb
+  ];
+}
diff --git a/roles/workstation.nix b/roles/workstation.nix
index 861dc3b..5994bb4 100644
--- a/roles/workstation.nix
+++ b/roles/workstation.nix
@@ -3,10 +3,21 @@
 {
   nixpkgs.config.allowUnfree = true;
 
-  # for ihp
-  nix.trustedUsers = [ "root" "me" ];
+  nix = {
+    # for ihp
+    trustedUsers = [ "root" "me" ];
+    # package = pkgs.nixUnstable;
+    # extraOptions = ''
+      # experimental-features = nix-command flakes
+    # '';
+  };
 
   boot = {
+    # function keys on keychron keyboard won't work otherwise
+    # extraModprobeConfig = "options hid_apple fnmode=2";
+    kernel.sysctl = {
+      "module.hid_apple.parameters.fnmode" = 2;
+    };
     # use latest kernel
     kernelPackages = pkgs.linuxPackages_latest;
     # Use the systemd-boot EFI boot loader.
@@ -21,6 +32,9 @@
         preLVM = true;
       };
     };
+
+    # loopback webcam
+    extraModulePackages = with config.boot.kernelPackages; [ v4l2loopback ];
   };
 
   networking.hostName = "w1n5t0n"; # Define your hostname.
@@ -68,13 +82,16 @@
     xfce.thunar-volman
     # mounting external devices in thunar
     gvfs
+
+    # loopback webcam
+    linuxPackages.v4l2loopback
   ];
 
     # mounting external devices as user
   services.udisks2.enable = true;
 
   # required for nextcloud
-  services.gnome3.gnome-keyring.enable = true;
+  services.gnome.gnome-keyring.enable = true;
 
   virtualisation.docker = {
     enable = true;
@@ -84,6 +101,7 @@
   # virtualisation.podman = {
   #   enable = true;
   #   dockerCompat = true;
+  #   dockerSocket.enable = true;
   # };
   # virtualisation.lxd.enable = true;
   # virtualisation.virtualbox.host.enable = true;
@@ -132,7 +150,13 @@
       #   anonymousClients.allowAll = true;
       # };
     };
-    opengl.driSupport32Bit = true;
+    opengl = {
+	driSupport32Bit = true;
+	extraPackages = with pkgs; [
+            rocm-opencl-icd
+            rocm-opencl-runtime
+        ];
+    };
   };
 
   # set keyboard layout
@@ -191,6 +215,8 @@
       "docker"
       "networkmanager"
       "plugdev"
+      "users"
+      "uucp"
       "vboxusers"
       "video"
       "wheel"
@@ -211,6 +237,10 @@
   # Enable NTFS support
   boot.supportedFilesystems = [ "ntfs" ];
 
+  security.sudo = {
+    extraConfig = "Defaults insults";
+  };
+
   imports =
     [
       ./subroles/dev.nix
@@ -218,6 +248,7 @@
       ./subroles/internet.nix
       ./subroles/office.nix
       ./subroles/photography.nix
+      ./subroles/reversing.nix
       ./subroles/university.nix
     ];
 }