I don't recall having this problem. However, I'd probably skip that test and force the install. Once the module is installed it's just a matter of running something like this to inject your module. 
my $repo = CPAN::Mini::Inject->new;
$repo->parsecfg( '/home/httpd/html/cpan/.cpancfg' );
$repo->add( module      => $app_name,
            authorid    => $app_owner,
            version     => $app_version,
            file        => "$app_dir/$app_file" );

$repo->writelist;
$repo->inject;

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In reply to Re^3: Creating a local CPAN server by timotheus
in thread Creating a local CPAN server by neilwatson

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