diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ae645ec3..a1c20921 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -378,7 +378,7 @@ jobs:
     - name: Clean CMake cache
       shell: bash
       run: |
-        rm -rf build build_ai cmake_config.log
+        rm -rf build build_ai build/_deps cmake_config.log
 
     - name: Configure (Unix)
       if: runner.os != 'Windows'
diff --git a/cmake/grpc.cmake b/cmake/grpc.cmake
index d7d5ba95..68cfa16d 100644
--- a/cmake/grpc.cmake
+++ b/cmake/grpc.cmake
@@ -37,6 +37,8 @@ set(gRPC_BUILD_GRPC_PHP_PLUGIN OFF CACHE BOOL "" FORCE)
 set(gRPC_BUILD_GRPC_PYTHON_PLUGIN OFF CACHE BOOL "" FORCE)
 set(gRPC_BUILD_GRPC_RUBY_PLUGIN OFF CACHE BOOL "" FORCE)
 # Disable C++ reflection support (avoids extra proto generation)
+set(gRPC_BUILD_REFLECTION OFF CACHE BOOL "" FORCE)
+set(gRPC_BUILD_GRPC_REFLECTION OFF CACHE BOOL "" FORCE)
 set(gRPC_BUILD_GRPC_CPP_REFLECTION OFF CACHE BOOL "" FORCE)
 set(gRPC_BUILD_GRPCPP_REFLECTION OFF CACHE BOOL "" FORCE)