anchor.diff: -{ stdenv, fetchurl, fftwFloat, freetype, jack2, libclthreads, libclxclient, libsndfile, x11 }:
  +{ stdenv, fetchurl, makeWrapper
  +, expat, fftwFloat, fontconfig, freetype, jack2, libclthreads, libclxclient
  +, libsndfile, libxcb, xlibs
  +}:
   
   stdenv.mkDerivation rec {
     name = "tetraproc-${version}";
  
positive.code:     sha256 = "17y3vbm5f6h5cmh3yfxjgqz4xhfwpkla3lqfspnbm4ndlzmfpykv";
    };
  
    buildInputs = [ jack2 libclthreads libclxclient fftwFloat libsndfile freetype x11 ];
  
    makeFlags = [
      "PREFIX=$(out)"
  
negative.code:     cd ./source/
    '';
  
    postInstall = ''
      # Make sure Jack is avalable in $PATH for tetraproc
      wrapProgram $out/bin/tetraproc --prefix PATH : "${jack2}/bin"
    '';
  
    meta = with stdenv.lib; {
      description = "Converts the A-format signals from a tetrahedral Ambisonic microphone into B-format signals ready for recording";
      homepage = http://kokkinizita.linuxaudio.org/linuxaudio/;
  