anchor.diff:      boost
       curl
       eigen
  +    faust
       fftw
       glib
       glib-networking.out
  
positive.code: , boost
  , curl
  , eigen
  , fftw
  , gettext
  , glib
  
negative.code: 
  stdenv.mkDerivation rec {
    pname = "guitarix";
    version = "0.44.1";
  
    src = fetchurl {
      url = "mirror://sourceforge/guitarix/guitarix2-${version}.tar.xz";
      sha256 = "d+g9dU9RrDjFQj847rVd5bPiYSjmC1EbAtLe/PNubBg=";
    };
  
    nativeBuildInputs = [
      gettext
  