I was using flakes, yes. I remember seeing nix-diff, but most of the time nixos-rebuild dry-build was enough. Sometimes dry build was failing with error, but sw

I was using flakes, yes. I remember seeing nix-diff, but most of the time nixos-rebuild dry-build was enough. Sometimes dry build was failing with error, but switching or activating it ran without errors. Never figured out what was wrong :(