Merge #279694: barrier: fix 'uint8_t' is not a member of 'std'

...into staging-next

pkgs/applications/misc/barrier/default.nix

@@ -26,6 +26,11 @@ mkDerivation rec {
     })
   ];
 
+  CXXFLAGS = [
+    # error: 'uint8_t' is not a member of 'std'; did you mean 'wint_t'?
+    "-include cstdint"
+  ];
+
   buildInputs = [ curl xorg.libX11 xorg.libXext xorg.libXtst avahiWithLibdnssdCompat qtbase ];
   nativeBuildInputs = [ cmake wrapGAppsHook ];