.modulebuildrc is ignored

Hello,

I recently attempted to create an automated installation script using  
the methods from Module::Build. Specifically, this was the perl code  
which I used:

my $build = Module::Build->new(
								module_name => $mod_name,
								license 	=> 'perl',
								use_rcfile 	=> 1,
						 	  );
$build->create_build_script;
$build->dispatch('build');
$build->dispatch('test', verbose => 1);
$build->dispatch('install');

Unfortunately, this code tries to install the module to the root  
directory, for which I have no file permissions.  I want the module to  
install to a "~/lib/" subfolder of my home directory. I have the  
following .modulebuildrc file set up to do this:

install --install_base /Users/smanzer/

This installation method works if I run the scripts from the shell:

perl Build.PL
./Build
./Build test
./Build install

Is there a way to do get these built in methods to read  
my .modulebuildrc and act accordingly?

I really appreciate your help.

Sincerely,

Samuel F. Manzer

P.S.  I am running perl version 5.8.8 on Mac OS X v. 10.5.7