make web only partially successful on OSX

[Graham Percival]

"make web" will get as far as creating HTML files of the user manual  
(allowing me
to work on the "example templates" section), but it fails at some point  
after
that:


mkdir -p out-www/lilypond-internals/
LANG= makeinfo --output=./out-www/lilypond-internals  
--css-include=/Users/gperciva/usr/src/lilypond/Documentation/ 
texinfo.css --html out-www/lilypond-internals.texi
makeinfo: could not open --css-file:  
/Users/gperciva/usr/src/lilypond/Documentation/texinfo.css
makeinfo: could not open --css-file:  
/Users/gperciva/usr/src/lilypond/Documentation/texinfo.css
makeinfo: could not open --css-file:  
/Users/gperciva/usr/src/lilypond/Documentation/texinfo.css
makeinfo: could not open --css-file:  
/Users/gperciva/usr/src/lilypond/Documentation/texinfo.css
...
makeinfo: could not open --css-file:  
/Users/gperciva/usr/src/lilypond/Documentation/texinfo.css
makeinfo: could not open --css-file:  
/Users/gperciva/usr/src/lilypond/Documentation/texinfo.css
Too many errors!  Gave up.
make[3]: *** [out-www/lilypond-internals/lilypond-internals.html] Error  
1
rm out-www/music-glossary.texi
make[2]: *** [WWW] Error 2
make[1]: *** [WWW] Error 2
make: *** [web] Error 2


spark-daemonology-net:~/usr/src/lilypond gperciva$ more  
Documentation/texinfo.css
  hr { border:0; height:1; color: #000000; background-color: #000000; }
spark-daemonology-net:~/usr/src/lilypond gperciva$


Should texinfo.css contain more information than this?  Is makeinfo the  
problem?
I've got makeinfo 4.7


- Graham Percival