Update from source

python/flake.nix

@@ -3,25 +3,22 @@
 
   inputs.nixpkgs.url = "https://flakehub.com/f/NixOS/nixpkgs/0.1.*.tar.gz";
 
-  outputs =
-    { self
-    , nixpkgs
-    ,
-    }:
+  outputs = { self, nixpkgs }:
     let
       supportedSystems = [ "x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin" ];
-      forEachSupportedSystem = f:
-        nixpkgs.lib.genAttrs supportedSystems (system:
-          f {
-            pkgs = import nixpkgs { inherit system; };
-          });
+      forEachSupportedSystem = f: nixpkgs.lib.genAttrs supportedSystems (system: f {
+        pkgs = import nixpkgs { inherit system; };
+      });
     in
     {
       devShells = forEachSupportedSystem ({ pkgs }: {
         default = pkgs.mkShell {
-          packages = with pkgs;
-            [ python312 virtualenv ]
-            ++ (with pkgs.python312Packages; [ pip ]);
+          venvDir = "venv";
+          packages = with pkgs; [ python311 ] ++
+            (with pkgs.python311Packages; [ 
+              pip
+              venvShellHook 
+            ]);
         };
       });
     };