\paper{
  indent=0\mm
  line-width=120\mm
  oddFooterMarkup=##f
  oddHeaderMarkup=##f
  bookTitleMarkup = ##f
  scoreTitleMarkup = ##f
}
musicOne = \relative {
  c''4 b8. a16 g4. f8 e4 d c2
}
verseOne = \lyricmode {
  Joy to the world, the Lord is come.
}
\score {
  <<
    \new Voice = "one" {
      \time 2/4
      \musicOne
    }
    \new Lyrics \lyricsto "one" {
      \verseOne
    }
  >>
\midi{}
\layout{}
}

Aha die ganzen Fehlermeldungen verschwinden, wenn man <score raw=1> setzt.

Die Eingabedatei von LilyPond konnte nicht kompiliert werden:

line 33 - column 29:
syntax error, unexpected \lyricmode, expecting \sequential or \simultaneous or << or '{'
--------
line 138 - column 30:
syntax error, unexpected \lyricmode, expecting \sequential or \simultaneous or << or '{'
--------
line 2 - column 1:
errors found, ignoring music expression
--------
line 227 - column 1:
Unfinished main input