lilypond 1.3.99 compling problem

[Dwight J. Browne]

I'm stuck here:
gmake[1]: Entering directory `/export/home/devlop/tmp/lilypond-1.3.99/mf'
mp "&./out/mfplain \mode=lowres; \mag=1.0; nonstopmode; input feta-braces11.mf"
...
..
lots of postscript stuffs

and finally
%%EndProlog
mp: cannot open &./out/mfplain \mode=lowres; \mag=1.0; nonstopmode; input feta-braces11.mf
%%Trailer
%%Pages: 0
/usr/local/bin/python ../buildscripts/ps-to-pfa.py --output out/feta-braces11.pfa out/feta-braces11.0
Traceback (most recent call last):
  File "../buildscripts/ps-to-pfa.py", line 16, in ?
    import find
ImportError: No module named find
gmake[1]: *** [out/feta-braces11.pfa] Error 1
gmake[1]: Leaving directory `/export/home/devlop/tmp/lilypond-1.3.99/mf'
gmake: *** [all] Error 2

Any suggestions?

Thanks

-- 
Dwight J. Browne