add flake support

flake.lock

@@ -0,0 +1,40 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "locked": {
+        "lastModified": 1623875721,
+        "narHash": "sha256-A8BU7bjS5GirpAUv4QA+QnJ4CceLHkcXdRp4xITDB0s=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "f7e004a55b120c02ecb6219596820fcd32ca8772",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1627128856,
+        "narHash": "sha256-yw3lA8zyNFhj309lmxvNByEEymRT1rRy5oE+jEPnsP4=",
+        "path": "/nix/store/3iw3gnv08yaz0v5qjhmv6g4dlj7pirfz-source",
+        "rev": "dd14e5d78e90a2ccd6007e569820de9b4861a6c2",
+        "type": "path"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,15 @@
+{
+  description = "Assorted scripts";
+  inputs = {
+    flake-utils.url = github:numtide/flake-utils;
+  };
+  outputs = { self, flake-utils, nixpkgs, ... }: (flake-utils.lib.eachDefaultSystem (system:
+    let
+      pkgs = nixpkgs.legacyPackages.${system};
+    in
+    {
+      defaultPackage = self.packages.${system}.scripts;
+      packages.scripts = pkgs.callPackage ./default.nix { };
+    }
+  ));
+}