problems compiling 2.10.2 and 2.10.3

[luis jure]

hello list,

i can't compile either 2.10.2 or 2.10.3 on my gentoo linux (everything
went fine with 2.8.8). the problem is that configure doesn't detect
correctly the versions of guile and mftrace. configure stops thus:

ERROR: Please install required programs:  guile-config >= 1.6.7
(installed: 1.6) mftrace >= 1.1.19 (installed: 1.1) 

but:

address@hidden ~ $ guile-config --version
guile-config - Guile version 1.6.7

address@hidden ~ $ mftrace -v
mftrace 1.1.19

i tried to search for differences in the configure scripts between
2.8.8 (which works) and 2.10.3, but IANAP, so i couldn't make much of
it.

any help greatly appreciated.