Should this configuration work? It shouldn't, because you need to
evaluate config before knowing what config.foo
is.
{
inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
outputs = { nixpkgs, ... }: {
nixosConfigurations.test = nixpkgs.lib.nixosSystem {
system = "x86_64-linux";
modules = [
({ config, ... }: {
config = config.foo;
})
];
};
};
}