I don't think this should be a personal preference, I think it should be a standard*.
That said, it does at least seem like these recent changes are a large step in the right direction.
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* in terms of what the standard approach should be, we live in an imperfect world and package management has been done "wrong" in many ecosystems, but in an ideal world I think the "correct" solution here should be:
(1) If it's an end user tool it should be a self contained binary or it should be a system package installed via the package manager (which will manage any ancillary dependencies for you)
(2) If it's a dev tool (which, if you're cloning a cpp repo & building binaries, it is), it should not touch anything systemwide. Whatsoever.
This often results in a README with manual instructions to install deps, but there are many good automated ways to approach this. E.g. for CPP this is a solved problem with Conan Profiles. However that might incur significant maintenace overhead for the Unsloth guys if it's not something the ggml guys support. A dockerised build is another potential option here, though that would still require the user to have some kind of container engine installed, so still not 100% ideal.