page-count problem

[Patrick Karl]

I don't understand why the following snippet doesn't generate a 3-page 
pdf.  It would seem that either page-count=3 or systems-per-page=8 would 
accomplish that, but I always get a two-page pdf with 12 systems/page 
with any combination of the above two settings.

\version "2.19.35"

\paper { ragged-last-bottom = ##t }

music = \relative c'' { \repeat unfold 24 { c1 c c c \break } }

\score {
    \new Staff \music
    \layout {
        page-count = 3
%        systems-per-page = 8
    }
}