pob: make sure it runs with the proper QT_QPA_PLATFORM

overlays/pathofbuilding/default.nix

@@ -1,3 +1,8 @@
-{ channels, ... }:
+{ ... }:
-
+final: prev: {
-final: prev: { inherit (channels.nixpkgs-unstable) pobfrontend; }
+  path-of-building = prev.path-of-building.overrideAttrs (prevAttrs: {
+    postInstall = ''
+      wrapProgram $out/bin/pobfrontend --set QT_QPA_PLATFORM xcb
+    '';
+  });
+}