I just did a nix flake update one one of my machines and I’m getting this error:
“Mbed TLS 2 is not maintained anymore”.
The problem is, it’s not something I’ve explicitly installed so fixing the issue requires understanding which package I’ve installed is using this unmaintained package. How can I do that without just trial and error?
The most straightforward solution is using nix why-depends.
Personally, I prefer using nix-tree and doing a search via Ctrl + /.
You question is likely related to the current breakage of Lutris, which pull sin mbedtls_2. This has been been fixed on unstable and 25.05, channel updates are under way: Making sure you're not a bot!
why-depends won’t work for eval errors.
OP can try
nixos-rebuild build --show-trace |& grep 'while evaluating derivation'
to see the chain of dependencies.