libdbusmenu-gtk2: drop

libappindicator-gtk2 provides compatibility for GTK 2 applications, and
is unused in Nixpkgs. since GTK 2 is long deprecated and being removed
from Nixpkgs, we remove this as well.

pkgs/by-name/li/libdbusmenu/package.nix

@@ -10,14 +10,13 @@
   json-glib,
   gobject-introspection,
   vala,
-  gtkVersion ? null,
-  gtk2,
+  withGtk3 ? false,
   gtk3,
   testers,
 }:
 
 stdenv.mkDerivation (finalAttrs: {
-  pname = "libdbusmenu-${if gtkVersion == null then "glib" else "gtk${gtkVersion}"}";
+  pname = "libdbusmenu-${if withGtk3 then "gtk3" else "glib"}";
   version = "16.04.0";
 
   src =
@@ -41,13 +40,7 @@ stdenv.mkDerivation (finalAttrs: {
     dbus-glib
     json-glib
   ]
-  ++
-    lib.optional (gtkVersion != null)
-      {
-        "2" = gtk2;
-        "3" = gtk3;
-      }
-      .${gtkVersion} or (throw "unknown GTK version ${gtkVersion}");
+  ++ lib.optional withGtk3 gtk3;
 
   patches = [
     ./requires-glib.patch
@@ -70,11 +63,10 @@ stdenv.mkDerivation (finalAttrs: {
     "CFLAGS=-Wno-error"
     "--sysconfdir=/etc"
     "--localstatedir=/var"
-    # TODO use `lib.withFeatureAs`
-    (if gtkVersion == null then "--disable-gtk" else "--with-gtk=${gtkVersion}")
+    (if withGtk3 then "--with-gtk=3" else "--disable-gtk")
+    "--disable-dumper"
     "--disable-scrollkeeper"
-  ]
-  ++ lib.optional (gtkVersion != "2") "--disable-dumper";
+  ];
 
   doCheck = false; # generates shebangs in check phase, too lazy to fix
 
@@ -98,7 +90,7 @@ stdenv.mkDerivation (finalAttrs: {
       "dbusmenu-glib-0.4"
       "dbusmenu-jsonloader-0.4"
     ]
-    ++ lib.optional (gtkVersion == "3") "dbusmenu-gtk${gtkVersion}-0.4";
+    ++ lib.optional withGtk3 "dbusmenu-gtk3-0.4";
     platforms = lib.platforms.unix;
     maintainers = [ lib.maintainers.msteen ];
   };

pkgs/top-level/aliases.nix

@@ -1271,6 +1271,7 @@ mapAliases {
   libclc = throw "'libclc' has been removed, as no packages use it; reach out to LLVM/Mesa maintainers if you need this back."; # Added 2026-08-06
   libdbiDrivers = warnAlias "'libdbiDrivers' has been renamed to 'libdbi-drivers'" libdbi-drivers; # Added 2026-02-08
   libdbiDriversBase = warnAlias "'libdbiDriversBase' has been renamed to 'libdbi-drivers-base'" libdbi-drivers-base; # Added 2026-02-08
+  libdbusmenu-gtk2 = throw "'libdbusmenu-gtk2' has been removed as it depended on the deprecated GTK 2 engine."; # Added 2026-08-10
   libdevil = throw "libdevil has been removed, as it was unmaintained in Nixpkgs and upstream since 2017"; # Added 2025-09-16
   libdevil-nox = throw "libdevil has been removed, as it was unmaintained in Nixpkgs and upstream since 2017"; # Added 2025-09-16
   libdisplay-info_0_2 = throw "`libdisplay-info_0_2` has been removed as it is was unused in Nixpkgs. Consider upgrading to `libdisplay-info_0_3` or `libdisplay-info` instead"; # Added 2026-08-04

pkgs/top-level/all-packages.nix

@@ -5950,8 +5950,7 @@ with pkgs;
     withSqlite = false;
   };
 
-  libdbusmenu-gtk2 = libdbusmenu.override { gtkVersion = "2"; };
-  libdbusmenu-gtk3 = libdbusmenu.override { gtkVersion = "3"; };
+  libdbusmenu-gtk3 = libdbusmenu.override { withGtk3 = true; };
 
   libdisplay-info_0_3 = callPackage ../by-name/li/libdisplay-info/0.3.nix { };