anchor.diff:  
     preFixup = ''
       wrapProgram $out/bin/split2flac \
  -      --argv0 "$out/bin/$0" \
  +      --set 'SPLIT2FLAC_CALLER' "\$0" \
         --prefix 'PATH' : "${cuetools}/bin" \
         --prefix 'PATH' : "${faac}/bin" \
         --prefix 'PATH' : "${flac}/bin" \
  
positive.code:     /* split2flac uses $0 to determine what format to convert to, but
         makeWrapper renames the file breaking the expected behavior */ ''
        sed -i split2flac \
          -e "s/\''${0##\*split2}/\$(echo \''${0##\*split2} | awk -F'-' '{print \$1}')/"
      '';
  
    configurePhase = "true";
  
negative.code:   installPhase = ''
      install -D -m755 -v 'split2flac' "$out/bin/split2flac"
      ln -sv $out/bin/split2flac $out/bin/split2m4a
      ln -sv $out/bin/split2flac $out/bin/split2mp3
      ln -sv $out/bin/split2flac $out/bin/split2ogg
      ln -sv $out/bin/split2flac $out/bin/split2wav
  
  