anchor.diff:          + "/audacity-ffmpeg.patch?h=packages/audacity&id=0c1e35798d4d70692";
         sha256 = "19fr674mw844zmkp1476yigkcnmb6zyn78av64ccdwi3p68i00rf";
       })
  -  ]
  -    ++ optional (hasPrefix "gcc-6" stdenv.cc.cc.name)
  -      (fetchpatch {
  -        name = "gcc6.patch";
  -        url = "https://github.com/audacity/audacity/commit/60f2322055756e8cacfe96530a12c63e9694482c.patch";
  -        sha256 = "07jlxr8y7ap3nsblx3zh8v9rcx7ajbcfnvwzhwykmbwbsyirgqf2";
  -      });
  +  ];
   
     preConfigure = /* we prefer system-wide libs */ ''
  -    mv lib-src lib-src-rm
  -    mkdir lib-src
  -    mv lib-src-rm/{Makefile*,lib-widget-extra,portaudio-v19,portmixer,portsmf,FileDialog,sbsms,libnyquist} lib-src/
  -    rm -r lib-src-rm/
  +    autoreconf -vi # use system libraries
   
       # we will get a (possibly harmless) warning during configure without this
       substituteInPlace configure \
  
positive.code:     pkgconfig file gettext wxGTK30 expat alsaLib
      libsndfile soxr libid3tag libjack2 lv2 lilv serd sord sratom suil gtk2
      ffmpeg libmad lame libvorbis flac soundtouch
    ]; #ToDo: detach sbsms
  
    enableParallelBuilding = true;
  
negative.code: { stdenv, fetchurl, wxGTK30, pkgconfig, file, gettext, gtk2, glib, zlib, perl, intltool,
    libogg, libvorbis, libmad, libjack2, lv2, lilv, serd, sord, sratom, suil, alsaLib, libsndfile, soxr, flac, lame, fetchpatch,
    expat, libid3tag, ffmpeg, soundtouch, /*, portaudio - given up fighting their portaudio.patch */
    autoconf, automake, libtool
    }:
  
  with stdenv.lib;
  
  stdenv.mkDerivation rec {
    version = "2.1.3";
    name = "audacity-${version}";
  
    src = fetchurl {
      url = "https://github.com/audacity/audacity/archive/Audacity-${version}.tar.gz";
      sha256 = "11mx7gb4dbqrgfp7hm0154x3m76ddnmhf2675q5zkxn7jc5qfc6b";
    };
    patches = [
      (fetchpatch {
  