[xgstation]

I know other ecosystems do the same and those are baffling too, especially for the newer created languages like rust, which is why https://internals.rust-lang.org/t/pre-rfc-sandboxed-determin... exists

[woodruffw]

Sandboxing is a great idea. But the fact that this is a near-universal feature of language packaging reveals a preference that's going to be hard to counter: users do want effectively-arbitrary system access at build time, because that's the paradigm that's supported by the million-and-one different ways in which a build environment can be valid.