anchor.diff:    buildInputs = [
       gst-plugins-base orc
       faad2 libass libkate libmms
  +    libnice webrtc-audio-processing # webrtc
  +    libbs2b
  +    ladspaH librdf # ladspa plug-in
  +    lilv lv2 serd sord sratom # lv2 plug-in
       libmodplug mpeg2dec
       openjpeg libopus librsvg
       fluidsynth libvdpau
  
positive.code: { stdenv, fetchurl, fetchpatch, meson, ninja, gettext
  , pkgconfig, python, gst-plugins-base, orc
  , faacSupport ? false, faac ? null
  , faad2, libass, libkate, libmms
  , libmodplug, mpeg2dec
  , openjpeg, libopus, librsvg
  , wildmidi, fluidsynth, libvdpau, wayland
  , libwebp, xvidcore, gnutls, mjpegtools
  
negative.code:         sha256 = "0hy0rcn35alq65yqwri4fqjz2hf3nyyg5c7rnndk51msmqjxpprk";
      })
      ./fix_pkgconfig_includedir.patch
      # Enable bs2b compilation
      # https://bugzilla.gnome.org/show_bug.cgi?id=794346
      (fetchurl {
        url = https://bugzilla.gnome.org/attachment.cgi?id=369724;
        sha256 = "1716mp0h2866ab33w607isvfhv1zwyj71qb4jrkx5v0h276v1pwr";
      })
    ];
  
    src = fetchurl {
  