flake.nix

{
  inputs = {
    typelevel-nix.url = "github:typelevel/typelevel-nix";
    nixpkgs.follows = "typelevel-nix/nixpkgs";
    flake-utils.follows = "typelevel-nix/flake-utils";
  };

  outputs = { self, nixpkgs, flake-utils, typelevel-nix }:
    flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs-x86_64 = import nixpkgs { system = "x86_64-darwin"; };
        scala-cli-overlay = final: prev: { scala-cli = pkgs-x86_64.scala-cli; };
        pkgs = import nixpkgs {
          inherit system;
          overlays = [ typelevel-nix.overlay scala-cli-overlay ];
        };
      in {
        devShell = pkgs.devshell.mkShell {
          imports = [ typelevel-nix.typelevelShell ];
          typelevelShell = {
            nodejs.enable = true;
            jdk.package = pkgs.jdk8;
          };
        };
      }

    );
}