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by pxc 1237 days ago
Traditionally you might also use NIX_PATH for secondary sources of packages and modules, like the Emacs overlay, NUR, or the Nix-Darwin repo.

But yeah if you pin all of your package sources and set your Nixpkgs config locally, you get all the benefits aside from the Nix evaluator's 'pure' mode, which gets some evaluation speedups due to caching.