add a flake for developing with nix

flake.lock

@@ -0,0 +1,60 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1741462378,
+        "narHash": "sha256-ZF3YOjq+vTcH51S+qWa1oGA9FgmdJ67nTNPG2OIlXDc=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "2d9e4457f8e83120c9fdf6f1707ed0bc603e5ac9",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "ref": "nixpkgs-unstable",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,22 @@
+{
+  inputs.nixpkgs.url = "nixpkgs/nixpkgs-unstable";
+  inputs.flake-utils.url = github:numtide/flake-utils;
+
+  outputs = { self, nixpkgs, flake-utils }:
+    with flake-utils.lib;
+  eachSystem allSystems (system:
+    let
+      pkgs = import nixpkgs { inherit system; };
+      python3 = (pkgs.python3.withPackages (ps: with ps; [
+        alive-progress
+        scapy
+      ])).override {
+        ignoreCollisions = true;
+      };
+    in {
+      devShells.default = with pkgs; mkShell {
+        packages = [ python3 ];
+      };
+    }
+  );
+}