I'm super appreciative to see posts like this. I love NixOS and Nix in general but getting cross compile to "just work" became a lot less trivial in a post-flake world and I feel like every time I have to do it I need to relearn the entire process.

Having a clear guide like this to keep as a handy reference is massively appreciated.

This is great information, thanks for taking the time to document and explain your process, this is the kind of nix content we need more of.