aarch64 Example

Initialise nixpkgs

Initialise nixpkgs with the correct crossSystem
Pick this from lib.systems.examples
Remember: You need to import <nixpkgs/lib> since, when initialising nixpkgs, you don’t have access to lib yet.

Two ways to do cross compilation

Option 1: `callPackage`

Use one of the packages you built yesterday (not NCDU - Zig doesn’t support cross compilation in nixpkgs for some reason)
See if anything else is needed to make cross-compilation work

Option 2: manually

Select packages from pkgsBuildHost and pkgsHostTarget
Put them into buildInputs and nativeBuildInputs as appropriate