The -r1 ebuild for kbd-1.06 passes either --enable-nls or --disable-nls to the configure script. The kbd-1.06 configure script, however, does not accept the --enable-nls option, and exits with 'usage: configure [--datadir=DATADIR] [--mandir=MANDIR]' when the --enable-nls option is used. It appears that kbd-1.06 builds with NLS support unless --disable-nls is used.
now fixed.