sub install_perl_module {
    my ($tarball) = @_;
    my $dir = $tarball;
    $dir =~ s/\.tar\.gz//;

    my $cmd = 'tar -zxvf ' . $tarball . ' ; ' .
        'pushd ' . $dir . ' ; ' .
            'perl Makefile.PL ; make ; make test ; make install ; ' .
                'popd';
    system($cmd);
}