Project: Create flake.nix

But it does not work because the git repository uses sha256 hashes which
nix does not yet support.

flake.nix

@@ -0,0 +1,21 @@
+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+  };
+  outputs = { self, nixpkgs }:
+    let
+      supportedSystems = [ "x86_64-linux" "aarch64-linux" ];
+      forAllSystems = nixpkgs.lib.genAttrs supportedSystems;
+    in
+      {
+        devShells = forAllSystems (system: {
+          default = nixpkgs.legacyPackages.${system}.mkShellNoCC {
+            packages = with nixpkgs.legacyPackages.${system}; [
+              ruff
+              poetry
+              python
+            ];
+          };
+        });
+      };
+}