refactor python module

hosts/mannaz/system.nix

@@ -30,7 +30,6 @@
   #   setLdLibraryPath = true;
   # };
 
-
   # Load nvidia driver for Xorg and Wayland
   services.xserver.videoDrivers = [ "nvidia" ];
 

modules/languages/python.nix

@@ -8,16 +8,13 @@
 let
   inherit (lib) mkIfIn;
   cfg = config.oizys.languages;
+
+  python = pkgs.python3.withPackages (ps: with ps; [ pip ]);
+  pixi = inputs.pixi.packages.${pkgs.system}.default;
 in
 {
   config = mkIfIn "python" cfg {
-    environment.systemPackages =
-      let
-        python = pkgs.python3.withPackages (ps: with ps; [ pip ]);
-        pixi = inputs.pixi.packages.${pkgs.system}.default;
-      in
-      with pkgs;
-      [
+    environment.systemPackages = [
       # https://github.com/Mic92/nix-ld?tab=readme-ov-file#my-pythonnodejsrubyinterpreter-libraries-do-not-find-the-libraries-configured-by-nix-ld
       (pkgs.writeShellScriptBin "python" ''
         export LD_LIBRARY_PATH=$NIX_LD_LIBRARY_PATH
@@ -29,9 +26,8 @@ in
         exec ${python}/bin/python "$@"
       '')
 
-        (python3.withPackages (ps: with ps; [ pip ]))
-        micromamba
       pixi
+      pkgs.micromamba
     ];
   };
 }