Can I stop NixOS from doublicating Apps after an Update?

[jtojnar]

@TLATER

Hmm, is the CAS not chunking the contents? I should look at it in detail at some point, I’d been assuming it works like casync.

As NobbZ says, that is not the case. But there is nix-casync:

Nix-casync, a more efficient way to store and substitute Nix store paths

This blog post introduces nix-casync, a HTTP binary cache using the casync mechanism internally to efficiently store NAR files in a deduplicated fashion, and provides an outlook on how to use it to speed up substitution.