[dikaiosune]

There's an ongoing discussion of using build caches with Cargo:

https://internals.rust-lang.org/t/is-a-shared-build-cache-a-...

TLDR: There's interest, but some wrinkles need to be sorted out.

[cm3]

I like Nix-style caches myself, but a gc-cache command is needed in order to clean up only the stuff that isn't referenced anymore. I hope that's a design consideration.