anchor.diff:  
     prePatch = ''
       sed -i 's|usr/||g' Makefile
  -  '';
  -
  -  buildPhase = ''
  -    make lv2
  -    make standalone
  -  '';
  -
  -  installPhase = ''
  -   make DESTDIR="$out" install
  +    sed -i "s|/usr/share/|$out/share/|" src/common/load_save.cpp
     '';
   
     meta = with lib; {
  
positive.code:         Simple arpeggiator
          Effects: Formant filter, stutter, delay
      '';
      license = lib.licenses.gpl3;
      maintainers = [ maintainers.magnetophon ];
      platforms = platforms.linux;
    };
  
negative.code:   buildInputs = [
      xorg.libX11 xorg.libXcomposite xorg.libXcursor xorg.libXext
      xorg.libXinerama xorg.libXrender xorg.libXrandr
      freetype alsa-lib curl libjack2 libGLU libGL lv2
    ];
    nativeBuildInputs = [ pkg-config ];
  
    CXXFLAGS = "-DHAVE_LROUND";
    enableParallelBuilding = true;
    makeFlags = [ "DESTDIR=$(out)" ];
  
    patches = [
      # gcc9 compatibility https://github.com/mtytel/helm/pull/233
  