droidcam.nix

droidcam.nix

{ stdenv, fetchzip, pkgconfig, ffmpeg, gtk2-x11, libjpeg }:

stdenv.mkDerivation rec {
  pname = "droidcam";
  version = "0";

  src = fetchzip {
    url = "https://github.com/aramg/droidcam/archive/b49842a02611f8ddc6b9342ef74e299abd1c4090.zip";
    sha256 = "05kd5ihwb3fldmalv67jgpw4x0z0q39lfis69r7yh03qiqlviymk";
  };

  sourceRoot = "source/linux";

  buildInputs = [ pkgconfig ];
  nativeBuildInputs = [ ffmpeg gtk2-x11 libjpeg ];

  postPatch = ''
    sed -i -e 's:/opt/libjpeg-turbo/include:${libjpeg.out}/include:' Makefile
    sed -i -e 's:/opt/libjpeg-turbo/lib`getconf LONG_BIT`/libturbojpeg.a:${libjpeg.out}/lib/libturbojpeg.so:' Makefile
  '';

  installPhase = ''
    mkdir -p $out/bin
    cp droidcam droidcam-cli $out/bin/
  '';

  meta = with stdenv.lib; {
    description = "DroidCam Linux client";
    homepage = https://github.com/aramg/droidcam;
  };
}

v4l2loopback-dc.nix

{ stdenv, fetchzip, kernel }:

stdenv.mkDerivation rec {
  pname = "v4l2loopback-dc";
  version = "0";

  src = fetchzip {
    url = "https://github.com/aramg/droidcam/archive/b49842a02611f8ddc6b9342ef74e299abd1c4090.zip";
    sha256 = "05kd5ihwb3fldmalv67jgpw4x0z0q39lfis69r7yh03qiqlviymk";
  };

  sourceRoot = "source/linux/v4l2loopback";

  KVER = "${kernel.modDirVersion}";
  KBUILD_DIR = "${kernel.dev}/lib/modules/${kernel.modDirVersion}/build";

  nativeBuildInputs = kernel.moduleBuildDependencies;

  postPatch = ''
    sed -i -e 's:/lib/modules/`uname -r`/build:${KBUILD_DIR}:g' Makefile
  '';

  installPhase = ''
    mkdir -p $out/lib/modules/${KVER}/kernels/media/video
    cp v4l2loopback-dc.ko $out/lib/modules/${KVER}/kernels/media/video/
  '';

  meta = with stdenv.lib; {
    description = "DroidCam kernel module v4l2loopback-dc";
    homepage = https://github.com/aramg/droidcam;
  };
}

zzz-README.md

configuration.nix:

let v4l2loopback-dc = pkgs.callPackage ./v4l2loopback-dc.nix {
      kernel = pkgs.linux_4_19;
    };
    droidcam = pkgs.callPackage ./droidcam.nix {};
in {
  boot.kernelPackages = pkgs.linuxPackages_4_19;
  boot.extraModulePackages = [ v4l2loopback-dc ];
  environment.systemPackages = [ droidcam ];
}

Where exactly should I put in in configuration.nix?

  nixos sudo nixos-rebuild switch                                   /etc/nixos
error: syntax error, unexpected LET, at /etc/nixos/configuration.nix:50:1
(use '--show-trace' to show detailed location information)
building Nix...
error: syntax error, unexpected LET, at /etc/nixos/configuration.nix:50:1
(use '--show-trace' to show detailed location information)

README.md is all. Paste your configuration.nix.

I updated this driver to the Linux kernel 5.4 and added support for Droidcam 1.7.2 in case you'd like the latest version (at this time of writing).
Thanks for your's, it saved me a lot of time!

https://gist.github.com/peterwilli/b61da8e2ddafe010f7178553135dc3d3