module installation cant find dependencies

i've just installed MIMEBase64 in a non-standard directory (vhosted).  The
problem is when I next try to install URI, i get the message:

perl Makefile.PL LIB=~/lib/perl5 PREFIX=~/lib/perl5 INC=~/lib/perl5
Warning: prerequisite MIME::Base64 failed to load: Can't locate
MIME/Base64.pm in @INC (@INC contains:
/usr/pkg/lib/perl5/5.6.1/alpha-netbsd /usr/pkg/lib/perl5/5.6.1
/usr/pkg/lib/perl5/site_perl/5.6.1/alpha-netbsd
/usr/pkg/lib/perl5/site_perl/5.6.1 /usr/pkg/lib/perl5/site_perl .) at
(eval 4) line 3.
Writing Makefile for URI