nixos/partition-manager: use qt6 when plasma6 is activated

This also fixes System Settings > Windows Shares complaining about the
wrong QT version under Plasma6.

nixos/modules/programs/partition-manager.nix

@@ -1,15 +1,21 @@
 { config, lib, pkgs, ... }:
 
-{
+let
+  cfg = config.programs.partition-manager;
+in {
   meta.maintainers = [ lib.maintainers.oxalica ];
 
   options = {
-    programs.partition-manager.enable = lib.mkEnableOption (lib.mdDoc "KDE Partition Manager");
+    programs.partition-manager = {
+      enable = lib.mkEnableOption (lib.mdDoc "KDE Partition Manager");
+
+      package = lib.mkPackageOption pkgs [ "libsForQt5" "partitionmanager" ] { };
+    };
   };
 
   config = lib.mkIf config.programs.partition-manager.enable {
-    services.dbus.packages = [ pkgs.libsForQt5.kpmcore ];
+    services.dbus.packages = [ cfg.package.kpmcore ];
     # `kpmcore` need to be installed to pull in polkit actions.
-    environment.systemPackages = [ pkgs.libsForQt5.kpmcore pkgs.libsForQt5.partitionmanager ];
+    environment.systemPackages = [ cfg.package.kpmcore cfg.package ];
   };
 }

nixos/modules/services/desktop-managers/plasma6.nix

@@ -286,6 +286,7 @@ in {
     };
 
     programs.kdeconnect.package = kdePackages.kdeconnect-kde;
+    programs.partition-manager.package = kdePackages.partitionmanager;
 
     # FIXME: ugly hack. See #292632 for details.
     system.userActivationScripts.rebuildSycoca = activationScript;

pkgs/applications/kde/partitionmanager/default.nix

@@ -1,5 +1,4 @@
 { mkDerivation
-, fetchurl
 , lib
 , extra-cmake-modules
 , kdoctools
@@ -80,6 +79,10 @@ mkDerivation {
     )
   '';
 
+  passthru = {
+    inherit kpmcore;
+  };
+
   meta = with lib; {
     description = "KDE Partition Manager";
     longDescription = ''

pkgs/kde/gear/partitionmanager/default.nix

@@ -6,5 +6,10 @@ mkKdeDerivation {
   pname = "partitionmanager";
 
   propagatedUserEnvPkgs = [kpmcore];
+
+  passthru = {
+    inherit kpmcore;
+  };
+
   meta.mainProgram = "partitionmanager";
 }