building web fails on 2.6.0 osx, with Vera font example

[Graham Percival]

Changing fonts example from the docs:
{
  \override Staff.TimeSignature #'font-name = #"Times"
  \override Staff.TimeSignature #'font-size = #2
  \time 3/4
  c'1_\markup {
    \override #'(font-name . "Vera Bold")
      { This text is in Vera Bold }
  }
}

produces

...
Calculating line breaks... [2]
Calculating page breaks...
Layout output to  
`faa.ps'.../Users/gperciva/usr/pkg/lilypond/share/lilypond/2.6.0/scm/ 
framework-ps.scm:303:13: In expression (ly:warn (_ "Couldn't extract  
file matching ~a from ~a") name ...):
/Users/gperciva/usr/pkg/lilypond/share/lilypond/2.6.0/scm/framework- 
ps.scm:303:13: Unbound variable: ly:warn
spark:~/tmp gperciva$


I was hoping that the new fontforge would fix this, but it didn't.   
This problem first
occurred about a week ago -- I'm exactly certain; since then, I've been  
commenting out
this example whenever I build the docs.

- Graham