{
  description = "Oceanbox internal Nix package overlay";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
  };

  outputs =
    { self, nixpkgs, ... }:
    let
      eachSystem = nixpkgs.lib.genAttrs [
        "aarch64-darwin"
        "aarch64-linux"
        "x86_64-darwin"
        "x86_64-linux"
      ];

      pkgsFor =
        system:
        import nixpkgs {
          inherit system;
          config.allowUnfree = true;
          overlays = [ self.overlays.default ];
        };
    in
    {
      overlays = {
        default = import ./overlay.nix;
      };

      packages = eachSystem (
        system:
        import ./default.nix {
          pkgs = pkgsFor system;
        }
      );

      legacyPackages = eachSystem pkgsFor;
    };
}