Have you looked at the RT page for the module, and filed a bug report if there is not a similar one already filed? When I looked at the one for Net::PCAP (at https://rt.cpan.org/Public/Dist/Display.html?Name=Net-Pcap, although I'm not sure that was the one in question), I found a bug report of an issue with installation on MS-Win platforms that included several patches for that particular module.

Also, please be aware that almost all modules are written and/or supported by volunteers. While many of them try their best to be supportive and reactive to bug reports, they may lack time or resources to work on a particular bug (especially one with a "This must be fixed NOW!" attitude). If the bug is that critical to you or your employer, perhaps you should look into supporting the author/maintainer of the modules you need, at least for this one incident, by whatever means are at your disposal, such as by filing clear and informative bug reports, offering patches (if you have the capability to do so), offering to test potential fixes, monetary assistance, etc.