add ffmpeg

modules/hardware/misc/fakecam.nix

@@ -0,0 +1,11 @@
+{ pkgs, config, ... }: {
+  boot = {
+    extraModulePackages = with config.boot.kernelPackages; [ v4l2loopback ];
+    kernelModules = [ "v4l2loopback" ];
+    extraModprobeConfig = ''
+      options v4l2loopback exclusive_caps=1 card_label="Virtual Camera"
+    '';
+  };
+
+  environment.systemPackages = [ pkgs.v4l-utils ];
+}

modules/hardware/thinkpad.nix

@@ -4,6 +4,7 @@
     ./misc/power-button.nix
     ./misc/cpu-freq.nix
     ./misc/tzupdate.nix
+    ./misc/fakecam.nix
     ./core/hibernation.nix
     ./core/firmware.nix
     ./core/igpu.nix

modules/system/misc/utilities.nix

@@ -35,7 +35,7 @@
     distrobox
 
     ventoy-full-qt
-    home-manager
+    ffmpeg
     vim
     wget
     curl
@@ -53,6 +53,7 @@
     lxappearance
     freerdp
 
+    home-manager
     nix-index
     nixd
     nil