diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 2f583ac5cdec..3ccef4ab8b5a 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -1067,6 +1067,7 @@ in
 
     mozc = callPackage ../tools/inputmethods/ibus-engines/ibus-mozc {
       inherit (pythonPackages) gyp;
+      protobuf = protobuf.override { stdenv = clangStdenv; };
     };
 
     table = callPackage ../tools/inputmethods/ibus-engines/ibus-table {