From 5d55db5fcef6054553b83ca693980740914913e0 Mon Sep 17 00:00:00 2001
From: Scott Worley <scottworley@scottworley.com>
Date: Sun, 5 Oct 2025 17:31:55 -0700
Subject: [PATCH] A NixOS module for loading and configuring the v4l2loopback
 kernel module

---
 modules/v4l2loopback.nix | 11 +++++++++++
 1 file changed, 11 insertions(+)
 create mode 100644 modules/v4l2loopback.nix

diff --git a/modules/v4l2loopback.nix b/modules/v4l2loopback.nix
new file mode 100644
index 0000000..e4618c7
--- /dev/null
+++ b/modules/v4l2loopback.nix
@@ -0,0 +1,11 @@
+# h/t: https://askubuntu.com/questions/165727/is-it-possible-for-two-processes-to-access-the-webcam-at-the-same-time
+# h/t: https://www.reddit.com/r/NixOS/comments/p8bqvu/how_to_install_v4l2looback_kernel_module/
+
+{ config, ... }: {
+  boot.extraModulePackages = with config.boot.kernelPackages;
+    [ v4l2loopback.out ];
+  boot.kernelModules = [ "v4l2loopback" ];
+  boot.extraModprobeConfig = ''
+    options v4l2loopback video_nr=9 exclusive_caps=1 card_label="Shareable Camera"
+  '';
+}
-- 
2.50.1