make external_binary web fails with current CVS

[Graham Percival]

Trying to build docs results in this message:


DVIPS usage:
    dvips -h ./out-www/collated-files.psfonts 
./out-www/collated-files.dvi
Traceback (most recent call last):
  File "../../scripts/lilypond-book.py", line 1707, in ?
    main ()
  File "../../scripts/lilypond-book.py", line 1704, in main
    open (dep_file, 'w').write ('%s: %s' % (final_output_file, ' '.join 
(inputs)))
IOError: [Errno 2] No such file or directory: 
'./out-www/out-www/collated-files.dep'
make[3]: *** [out-www/collated-files.texi] Error 1
rm out-www/collated-files.texi