Switch to flakes for building

flake.nix

@@ -0,0 +1,41 @@
+{
+	description = "Standard images that Greg wants to build";
+	inputs = {
+		nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+		flake-parts.url = "github:hercules-ci/flake-parts";
+		greg.url = "github:greg-hellings/nixos-config";
+	};
+
+	outputs = inputs@{ self, nixpkgs, flake-utils, greg, flake-parts }:
+	flake-parts.lib.mkFlake { inherit inputs; } {
+		flake = {
+		};
+		systems = [
+			"x86_64-linux"
+			"aarch64-linux"
+			"x86_64-darwin"
+			"aarch64-darwin"
+		];
+		perSystem = sys@{ config, pkgs, system, ... }: {
+			_module.args.pkgs = import nixpkgs {
+				inherit system;
+				config.allowUnfree = true;
+			};
+			packages = {
+				vm-test = pkgs.dockerTools.buildLayeredImage {
+					name = "vm-test";
+					contents = with pkgs; [
+						bash
+						curl
+						findutils
+						jq
+						packer
+						(python3.withPackages (p: with p; [ pyyaml ]))
+						shellcheck
+						xonsh
+					];
+				};
+			};
+		};
+	};
+}