Building mate and encountering a few bumps.

[Super Bisquit]

Can't locate XML/Simple.pm in @INC (@INC contains:
/usr/local/lib/perl5/5.14.2/BSDPAN
/usr/local/lib/perl5/site_perl/5.14.2/mach
/usr/local/lib/perl5/site_perl/5.14.2 /usr/local/lib/perl5/5.14.2/mach
/usr/local/lib/perl5/5.14.1 .) at /usr/local/libexec/icon-name-mapping
line 12.
BEGIN failed--compilation aborted at
/usr/local/libexec/icon-name-mapping line 12.
gmake [5]: *** [install-data-local] Error 2.

Okay, what did I do wrong?