{sources ? import ./npins}: {
  # for repl sessions
  inherit sources;
  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];
    };
    hydrogen = {
      system = "aarch64-linux";
      modules = [./nix/configurations/hydrogen.nix];
    };
    installer = {
      system = "x86_64-linux";
      modules = [./nix/configurations/installer.nix];
    };
  };

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