depot/third_party/nixpkgs/pkgs/os-specific/linux/v4l2loopback/default.nix

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{ lib, stdenv, fetchFromGitHub, kernel, kmod }:
stdenv.mkDerivation rec {
pname = "v4l2loopback";
version = "unstable-2023-02-19-${kernel.version}";
src = fetchFromGitHub {
owner = "umlaeute";
repo = "v4l2loopback";
rev = "fb410fc7af40e972058809a191fae9517b9313af";
hash = "sha256-gLFtR7s+3LUQ0BZxHbmaArHbufuphbtAX99nxJU3c84=";
};
patches = [
# fix bug https://github.com/umlaeute/v4l2loopback/issues/535
./revert-pr518.patch
];
hardeningDisable = [ "format" "pic" ];
preBuild = ''
substituteInPlace Makefile --replace "modules_install" "INSTALL_MOD_PATH=$out modules_install"
sed -i '/depmod/d' Makefile
'';
nativeBuildInputs = [ kmod ] ++ kernel.moduleBuildDependencies;
postInstall = ''
make install-utils PREFIX=$bin
'';
outputs = [ "out" "bin" ];
makeFlags = kernel.makeFlags ++ [
"KERNELRELEASE=${kernel.modDirVersion}"
"KERNEL_DIR=${kernel.dev}/lib/modules/${kernel.modDirVersion}/build"
];
meta = with lib; {
description = "A kernel module to create V4L2 loopback devices";
homepage = "https://github.com/umlaeute/v4l2loopback";
license = licenses.gpl2Only;
maintainers = with maintainers; [ moni ];
platforms = platforms.linux;
outputsToInstall = [ "out" ];
};
}