Creating even vertical spacing in LilyPond

This breaks voice produces uneven vertical spacing.

      \new Voice {
         \overrideProperty #"Score.NonMusicalPaperColumn"
         #'line-break-system-details #'((Y-offset . 0))
         s1 \noBreak
         s1 \noBreak
         s1 \break
         \overrideProperty #"Score.NonMusicalPaperColumn"
         #'line-break-system-details #'((Y-offset . 15))
         s1 \noBreak
         s1 \noBreak
         s1 \break
         \overrideProperty #"Score.NonMusicalPaperColumn"
         #'line-break-system-details #'((Y-offset . 30))
         s1 \noBreak
         s1 \noBreak
         s1 \break
      }

This breaks voice produces even vertical spacing.

      \new Voice {
         \overrideProperty #"Score.NonMusicalPaperColumn"
         #'line-break-system-details 
         #'((Y-offset . 0) (alignment-offsets . (0)))
         s1 \noBreak
         s1 \noBreak
         s1 \break
         \overrideProperty #"Score.NonMusicalPaperColumn"
         #'line-break-system-details 
         #'((Y-offset . 15) (alignment-offsets . (0)))
         s1 \noBreak
         s1 \noBreak
         s1 \break
         \overrideProperty #"Score.NonMusicalPaperColumn"
         #'line-break-system-details 
         #'((Y-offset . 30) (alignment-offsets . (0)))
         s1 \noBreak
         s1 \noBreak
         s1 \break
      }

Even vertical spacing requires alignment-offets set to zero for even a single staff.