anchor.diff:  
     free = stdenv.mkDerivation {
       name = "clementine-free-${version}";
  -    inherit patches src buildInputs;
  +    inherit src patches nativeBuildInputs buildInputs;
  +
  +    cmakeFlags = [ "-DUSE_SYSTEM_PROJECTM=ON" ];
  +
       enableParallelBuilding = true;
       postPatch = ''
         sed -i src/CMakeLists.txt \
  
positive.code:   dontPatchELF = true;
    dontStrip = true;
    meta = {
      homepage = http://www.clementine-player.org;
      description = "A multiplatform music player"
        + " (" + (optionalString withSpotify "with Spotify, ")
        + "with gstreamer plugins: "
        + concatStrings (intersperse ", " (map (x: x.name) gst_plugins))
        + ")";
      license = licenses.gpl3Plus;
      platforms = platforms.linux;
      maintainers = [ maintainers.ttuegel ];
    };
  }
  ''
  
negative.code:     ./clementine-spotify-blob-remove-from-build.patch
    ];
  
    nativeBuildInputs = [ cmake pkgconfig ];
  
    buildInputs = [
      boost
      chromaprint
      fftw
      gettext
  