Why would anyone want to integrate with the OS package manager? Windows, as you've said yourself, doesn't even have one (and thank goodness for that) while on Linux, the distributed packages are normally about 2 to 4 years out of date — unless you discover and use specific 3rd-party repositories at which point what's even the point then? Just use the language's CPAN/PyPI/Hex/Crates.io/etc. analogue.