Any example of shared-builds use case from builtwithnix.org

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Quoting from https://builtwithnix.org, under Why Nix?

Nix allows to easily share build results across machines. 
If the CI has built the project, developers or servers can 
download the build results instead of re-building the same thing.

Any example of how to achieve this shared build results ?

I’m currently trying to build a development build-server and I’m exploring Nix in order to create a reproducible development environment. So far we’ve been using asdf but using Nix seems like a much better aproach to having the exact same environment.

Somehow I just visited the webpage I quoted above and got interested in that particular sentence of never having to re-build the exact same sources if they have already been built somewhere else. Any pointers?

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Haven’t use it because I don’t need a remote build cache right now, but sounds like a good example. Cachix

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I think the core thing you’re looking for is whats usually called “binary caches” around here. I can’t say much because I haven’t set it up myself.

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