anchor.diff: -{ stdenv, fetchurl, makeWrapper, python, alsaUtils, timidity }:
  +{ stdenv, fetchurl, makeWrapper, python3, alsaUtils, timidity }:
   
     stdenv.mkDerivation rec {
     version = "16.06";
  
positive.code:     sed -i 's@/usr/bin/arecord@/${alsaUtils}/bin/arecord@g' util/mma-splitrec.py
      sed -i 's@/usr/bin/timidity@/${timidity}/bin/timidity@g' mma-splitrec
      sed -i 's@/usr/bin/timidity@/${timidity}/bin/timidity@g' util/mma-splitrec.py
      find . -type f | xargs sed -i 's@/usr/bin/env python@${python}/bin/python@g'
    '';
  
    installPhase = ''
  
negative.code:     sha256 = "1g4gvc0nr0qjc0fyqrnx037zpaasgymgmrm5s7cdxqnld9wqw8ww";
    };
  
    buildInputs = [ makeWrapper python3 alsaUtils timidity ];
  
    patchPhase = ''
      sed -i 's@/usr/bin/aplaymidi@/${alsaUtils}/bin/aplaymidi@g' mma-splitrec
  