building lilypond 2.8.1 on Debian unstable

[Thomas Bushnell BSG]

I'm trying to build lilypond 2.8.1 on debian unstable.

Doing ./configure and make, it configures sensibly AFAICT, and starts
building, and then dies with the following:

/usr/bin/perl /home/src/lilypond-2.8.1/buildscripts/out/help2man out/convert-ly 
> out/convert-ly.1
help2man: can't get `--help' info from out/convert-ly
make[1]: *** [out/convert-ly.1] Error 1
make[1]: Leaving directory `/home/src/lilypond-2.8.1/scripts'
make: *** [all] Error 2


So I do: scripts/out/convert-ly --help, to see what's happening, and
it says:

Traceback (most recent call last):
  File "scripts/out/convert-ly", line 39, in ?
    import lilylib as ly
ImportError: No module named lilylib


Looking at the script, it is looking for the lilylib module in the
installation directory, and doesn't contain any code or other help to
locate it in the build directory.

Thomas