frobar: Set pyproject = true

Requirement for 25.11

Also quite a few simplifications I can just make? Neat.

hm/desktop/frobar/default.nix

@@ -1,26 +1,37 @@
 {
-  # nixpkgs ? <nixpkgs>,
-  # nixpkgs ? builtins.getFlake "github:GeoffreyFrogeye/nixpkgs/zelbar",
-  nixpkgs ? /nix/store/8g86qw3c2fr56bhhvqznrlic4jig9hb3-source,
+  zelbarnixpkgs ? builtins.getFlake "github:GeoffreyFrogeye/nixpkgs/zelbar",
+  nixpkgs ? <nixpkgs>,
   pkgs ? import nixpkgs {
-    config = { };
-    overlays = [ ];
+    overlays = [
+      (
+        self: super:
+        let
+          zelbarpkgs = import zelbarnixpkgs { inherit (super) system; };
+        in
+        {
+          inherit (zelbarpkgs) zelbar;
+        }
+      )
+    ];
   },
   ...
 }:
-# Tried using pyproject.nix but mpd2 dependency wouldn't resolve,
-# is called pyton-mpd2 on PyPi but mpd2 in nixpkgs.
-pkgs.python3Packages.buildPythonPackage rec {
+pkgs.python3Packages.buildPythonApplication rec {
   pname = "frobar";
   version = "3.1";
 
-  dependencies = with pkgs.python3Packages; [
+  dependencies =
+    (with pkgs.python3Packages; [
       i3ipc
       psutil
       pulsectl-asyncio
       pygobject3
       rich
-  ];
+    ])
+    ++ (with pkgs; [
+      wirelesstools
+      zelbar
+    ]);
 
   nativeBuildInputs = with pkgs; [
     wrapGAppsHook4
@@ -31,26 +42,8 @@ pkgs.python3Packages.buildPythonPackage rec {
     playerctl
   ];
 
-  preFixup = ''
-    makeWrapperArgs+=(
-      ''${gappsWrapperArgs[@]}
-      --prefix PATH : ${
-        pkgs.lib.makeBinPath (
-          with pkgs;
-          [
-            wirelesstools
-            zelbar
-          ]
-        )
-      }
-      --prefix LD_LIBRARY_PATH : ${LD_LIBRARY_PATH}
-    )
-  '';
-
-  LD_LIBRARY_PATH = pkgs.lib.makeLibraryPath [
-    pkgs.glib.out
-    pkgs.playerctl
-  ];
+  pyproject = true;
+  build-system = [ pkgs.python3Packages.setuptools ];
 
   src = ./.;
 }

hm/desktop/frobar/setup.py

@@ -7,7 +7,7 @@ setup(
         "i3ipc",
         "psutil",
         "pulsectl-asyncio",
-        "pygobject3",
+        "pygobject",
         "rich",
     ],
     entry_points={