Is it possible to change beaming from the \layout block?

[Vaughan McAlley]

This code compiles without complaint, but the beams are still in
groups of four. What am I doing wrong?

\version "2.16.0"

myNotes = \relative c' {
  \time 4/4
  d8 d d d d d d d
}

\score {
  \new Staff = "RH" <<
    \context Staff <<
      \new Voice { \myNotes }
    >>
  >>
  \layout {
    \context {
      \RemoveEmptyStaffContext % in case this is relevant
    }
    \context {
      \Voice
      \override Timing #'baseMoment = #(ly:make-moment 1 8)
      \override Timing #'beatStructure = #'(2 2 2 2)
      \override Timing #'beamExceptions = #'()
    }
  }
}


Thanks,
Vaughan