{sources ? import ./npins}: let
  # Catch where currentSystem is evaluated
  fakeImport = builtins.scopedImport {
    builtins =
      builtins
      // {
        currentSystem = throw "`currentSystem' is disabled";
      };
    import = fakeImport;
  };
in {
  lib = import (sources.nixpkgs + "/lib");

  nixosConfigurations = builtins.mapAttrs (_: import (sources.nixpkgs + "/nixos/lib/eval-config.nix")) {
    vanadium = {
      system = "x86_64-linux";
      modules = [./nix/configurations/vanadium.nix];
    };
    tungsten = {
      system = "x86_64-linux";
      modules = [./nix/configurations/tungsten.nix];
    };
    installer = {
      system = "x86_64-linux";
      modules = [./nix/configurations/installer.nix];
    };
  };

  packages = import ./nix/packages {inherit sources;};
}