anchor.diff:  , libsndfile
   , jack2_lib
   , lirc
  -, openssl_1-0-2
  +, openssl
   , sbc
   , soxr
   , speexdsp
  
positive.code: 
    src = fetchurl rec {
      url = "https://freedesktop.org/software/pulseaudio/releases/pulseaudio-${version}.tar.xz";
      sha1Url = "${url}.sha1";
      sha256 = "c3d3d66b827f18fbe903fe3df647013f09fc1e2191c035be1ee2d82a9e404686";
    };
  
    nativeBuildInputs = [
  
negative.code:     avahi
      jack2_lib
      lirc
      openssl
      soxr
      systemd_lib
      webrtc-audio-processing
  