Comment by awesome_dude

I think one of the key problems too is that a system level dependency is managed by people dedicated to ensuring the chaotic nature of the package they are responsible for conforms to the way the OS they are maintaining for has proscribed.

There's no real way to do that at a language level - we cannot have "Go has determined the package you are trying to fix has not met the versioning requirements proscribed so you cannot submit the patch to fix it"

What language dependencies do is what OSes would think of as "unofficial versioning" that is, an OS will let you install and run an unofficial version of some lib (we've all been there, right, multiple versions of some core library because one doesn't work with whatever you are trying to install), but they will not manage it at all.