Building lnav is difficult / impossible without internet connection

I'm trying to setup building lnav for my company containers, but to do this I need to be able to build lnav with just sources and no connection to the internet. To achieve this I'd need to be able to link against system dependencies instead of downloading them via vcpkg.

As well I'd need to do something about cargo (maybe that could be an optional feature at build?)

Thanks for any help navigating this!