1 files changed, 37 insertions, 0 deletions

diff --git a/overlays/v4l2loopback.nix b/overlays/v4l2loopback.nix
new file mode 100644
index 00000000..335f86a3
--- /dev/null
+++ b/overlays/v4l2loopback.nix
@@ -0,0 +1,37 @@
+final: prev: {
+  linuxPackages_latest = prev.linuxPackages_latest.extend (self: super: {
+    v4l2loopback = super.stdenv.mkDerivation rec {
+      name = "v4l2loopback-${version}-${self.kernel.version}";
+      version = "f62fb9076b6313e5eb82fdcaceadb6b3052f346e";
+
+      src = prev.fetchFromGitHub {
+        owner = "umlaeute";
+        repo = "v4l2loopback";
+        rev = "${version}";
+        sha256 = "VRFtimQQtT8vd1dx5KtUDkmXo3DSOybhNLcAIxQba44=";
+        fetchSubmodules = true;
+      };
+
+      hardeningDisable = [ "format" "pic" ];
+
+      preBuild = ''
+        substituteInPlace Makefile --replace "modules_install" "INSTALL_MOD_PATH=$out modules_install"
+        sed -i '/depmod/d' Makefile
+        export PATH=${final.kmod}/sbin:$PATH
+      '';
+
+      nativeBuildInputs = self.kernel.moduleBuildDependencies;
+      buildInputs = [ final.kmod ];
+
+      makeFlags = [
+        "KERNELRELEASE=${self.kernel.modDirVersion}"
+        "KERNEL_DIR=${self.kernel.dev}/lib/modules/${self.kernel.modDirVersion}/build"
+      ];
+
+      postInstall = ''
+        mkdir -p $out/bin
+        install -m0755 utils/v4l2loopback-ctl $out/bin
+      '';
+    };
+  });
+}