nixos/profiles/systems/builder.nix

   1 { inputs, pkgs, lib, config, ... }:
   2 {
   3 nix.nixPath = [
   4   "nixpkgs=/etc/nixpkgs:nixpkgs-overlays=/etc/nixpkgs-overlays/overlays.nix"
   5 ];
   6 nix.extraOptions = "experimental-features = nix-command flakes";
   7 # Note that this will make the target system download Nixpkgs.
   8 nix.registry.nixpkgs.flake = pkgs.path;
   9 # WARNING: this is a hack to avoid copying Nixpkgs
  10 # a second time into the Nix store.
  11 # It makes only sense when Nixpkgs is already in the Nix store,
  12 # and is registered.
  13 environment.etc."nixpkgs".source = pkgs.path;
  14 environment.etc."nixpkgs-overlays".source =
  15   pkgs.writeTextDir "overlays.nix" ''
  16     import ${inputs.self + "/nixpkgs/overlays.nix"} ++
  17     import ${inputs.julm-nix + "/nixpkgs/overlays.nix"}
  18   '';
  19 }