build of Lilypond 2.3.20

[Victor S. Miller]

I just build Lilypond 2.3.20 on my redhat linux system.  However, when
I try

lilypond test.ly  (see below for the input), I get:

lilypond test.ly

Now processing `test.ly'
Parsing...

test.ly:2:12: error: unknown escaped string: `\notes':
      \notes
             <<

test.ly:2:11: error: parse error, unexpected STRING:
      \note
           s <<

error: failed files: test.ly

Here's test.ly:

 \score  {
      \notes <<
        \partial 4
        \relative c' {
           c4
           \times 2/3 { f g g } \times 2/3 { g4( a2) }
        }
        \lyricsto "" \new Lyrics \lyrics { I want to break free }
      >>
     }

Any suggestions, as to what the problem might be?
-- 
Victor S. Miller     | " ... Meanwhile, those of us who can compute can hardly
address@hidden    | be expected to keep writing papers saying 'I can do the
CCR, Princeton, NJ   | following useless calculation in 2 seconds', and indeed
    08540 USA        | what editor would publish them?"  -- Oliver Atkin