anchor.diff: -{ stdenv, fetchurl, gettext, intltool, pkgconfig, python2
  +{ stdenv, fetchurl, fetchpatch, faust, gettext, intltool, pkgconfig, python2
   , avahi, bluez, boost, eigen, fftw, glib, glib-networking
   , glibmm, gsettings-desktop-schemas, gtkmm2, libjack2
   , ladspaH, libav, libsndfile, lilv, lrdf, lv2, serd, sord, sratom
  
positive.code:     zita-resampler curl
    ];
  
    wafConfigureFlags = [
      "--shared-lib"
      "--no-desktop-update"
      "--enable-nls"
      "--no-faust" # todo: find out why --faust doesn't work
      "--install-roboto-font"
      "--includeresampler"
      "--convolver-ffmpeg"
  
negative.code:     sha256 = "1nn80m1qagfhvv69za60f0w6ck87vmk77qmqarj7fbr8avwg63s9";
    };
  
    patches = [
      (fetchpatch {
        url = "https://git.archlinux.org/svntogit/community.git/plain/trunk/guitarix-0.39.0-fix_faust_and_lv2_plugins.patch?id=8579b4dfe85e04303ad2d9771ed699f04ea7b7cf";
        stripLen = 1;
        sha256 = "0pgkhi4v4vrzjnig0ggmz207q4x5iyk2n6rjj8s5lv15fia7qzp4";
      })
    ];
  
    nativeBuildInputs = [ faust gettext intltool wrapGAppsHook pkgconfig python2 wafHook ];
  
    buildInputs = [
      avahi bluez boost eigen fftw glib glibmm glib-networking.out
  