anchor.diff:      libsndfile
     ];
   
  -  postPatch = ''
  -    patchShebangs ./waf
  -  '';
  -
  -  configurePhase = ''
  -    ./waf configure --prefix=$out
  -  '';
  -
  -  buildPhase = ''
  -    ./waf
  -  '';
  -
  -  installPhase = ''
  -    ./waf install
  +  postPatch = /* Fix compatibility with newer autowaf */ ''
  +    sed -i wscript \
  +      -e 's/False, True/False/' \
  +      -e 's/Options.platform/"random string"/'
     '';
   
     passthru = {
  
positive.code: { stdenv
  , fetchurl
  , python
  
  , gtk2
  , libsndfile
  }:
  
  stdenv.mkDerivation rec {
    name = "lv2-1.12.0";
  
    src = fetchurl {
      url = "http://lv2plug.in/spec/${name}.tar.bz2";
      sha256 = "7a4a53138f10ed997174c8bc5a8573d5f5a5d8441aaac2de6cf2178ff90658e9";
    };
  
    nativeBuildInputs = [
      python
    ];
  
    buildInputs = [
  
negative.code:         outputHashAlgo
          urls;
        failEarly = true;
        pgpsigUrls = map (n: "${n}.asc") src.urls;
        pgpKeyFingerprint = "907D 226E 7E13 FA33 7F01  4A08 3672 782A 9BF3 68F3";
      };
    };
  