anchor.diff: -{ stdenv, fetchurl, pkgconfig, gst-plugins-base, bzip2, libva, wayland
  +{ stdenv, fetchurl, meson, ninja, pkgconfig, gst-plugins-base, bzip2, libva, wayland
   , libdrm, udev, xorg, libGLU_combined, yasm, gstreamer, gst-plugins-bad, nasm
   , libvpx, python
   }:
  
positive.code: 
    outputs = [ "out" "dev" ];
  
    nativeBuildInputs = [ pkgconfig bzip2 ];
  
    buildInputs = [
      gstreamer gst-plugins-base gst-plugins-bad libva wayland libdrm udev
  
negative.code:     xorg.libICE libGLU_combined nasm libvpx python
    ];
  
    preConfigure = ''
      export GST_PLUGIN_PATH_1_0=$out/lib/gstreamer-1.0
      mkdir -p $GST_PLUGIN_PATH_1_0
    '';
  
    meta = {
      homepage = https://gstreamer.freedesktop.org;
  