Make ruby build debuggable
diff --git a/src/ruby/ext/grpc/extconf.rb b/src/ruby/ext/grpc/extconf.rb
index 7067933..4f5d770 100644
--- a/src/ruby/ext/grpc/extconf.rb
+++ b/src/ruby/ext/grpc/extconf.rb
@@ -84,7 +84,7 @@
   puts 'Building internal gRPC into ' + grpc_lib_dir
   nproc = 4
   nproc = Etc.nprocessors * 2 if Etc.respond_to? :nprocessors
-  system("make -j#{nproc} -C #{grpc_root} #{grpc_lib_dir}/libgrpc.a CONFIG=#{grpc_config}")
+  system("make -j#{nproc} -C #{grpc_root} #{grpc_lib_dir}/libgrpc.a CONFIG=#{grpc_config} Q=")
   exit 1 unless $? == 0
 end