diff -Naur grpc-1.56.2.orig/CMakeLists.txt grpc-1.56.2/CMakeLists.txt
--- grpc-1.56.2.orig/CMakeLists.txt	2023-09-06 11:26:23.792351429 +0800
+++ grpc-1.56.2/CMakeLists.txt	2023-09-06 11:27:22.148347246 +0800
@@ -332,83 +332,6 @@
   set(_gRPC_ALLTARGETS_LIBRARIES ${_gRPC_ALLTARGETS_LIBRARIES} ${_gRPC_SYSTEMD_LIBRARIES})
 endif()
 
-# Setup external proto library at third_party/envoy-api with 2 download URLs
-if (NOT EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/third_party/envoy-api)
-  # Download the archive via HTTP, validate the checksum, and extract to third_party/envoy-api.
-  download_archive(
-    ${CMAKE_CURRENT_SOURCE_DIR}/third_party/envoy-api
-    https://storage.googleapis.com/grpc-bazel-mirror/github.com/envoyproxy/data-plane-api/archive/68d4315167352ffac71f149a43b8088397d3f33d.tar.gz
-    3c7372b5cb33e5e5cc3afd82573fc6275f9a2cac8b1530e1af14f52f34047328
-    data-plane-api-68d4315167352ffac71f149a43b8088397d3f33d
-  )
-endif()
-if (NOT EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/third_party/envoy-api)
-  # Download the archive via HTTP, validate the checksum, and extract to third_party/envoy-api.
-  download_archive(
-    ${CMAKE_CURRENT_SOURCE_DIR}/third_party/envoy-api
-    https://github.com/envoyproxy/data-plane-api/archive/68d4315167352ffac71f149a43b8088397d3f33d.tar.gz
-    3c7372b5cb33e5e5cc3afd82573fc6275f9a2cac8b1530e1af14f52f34047328
-    data-plane-api-68d4315167352ffac71f149a43b8088397d3f33d
-  )
-endif()
-# Setup external proto library at third_party/googleapis with 2 download URLs
-if (NOT EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/third_party/googleapis)
-  # Download the archive via HTTP, validate the checksum, and extract to third_party/googleapis.
-  download_archive(
-    ${CMAKE_CURRENT_SOURCE_DIR}/third_party/googleapis
-    https://storage.googleapis.com/grpc-bazel-mirror/github.com/googleapis/googleapis/archive/2f9af297c84c55c8b871ba4495e01ade42476c92.tar.gz
-    5bb6b0253ccf64b53d6c7249625a7e3f6c3bc6402abd52d3778bfa48258703a0
-    googleapis-2f9af297c84c55c8b871ba4495e01ade42476c92
-  )
-endif()
-if (NOT EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/third_party/googleapis)
-  # Download the archive via HTTP, validate the checksum, and extract to third_party/googleapis.
-  download_archive(
-    ${CMAKE_CURRENT_SOURCE_DIR}/third_party/googleapis
-    https://github.com/googleapis/googleapis/archive/2f9af297c84c55c8b871ba4495e01ade42476c92.tar.gz
-    5bb6b0253ccf64b53d6c7249625a7e3f6c3bc6402abd52d3778bfa48258703a0
-    googleapis-2f9af297c84c55c8b871ba4495e01ade42476c92
-  )
-endif()
-# Setup external proto library at third_party/opencensus-proto/src with 2 download URLs
-if (NOT EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/third_party/opencensus-proto/src)
-  # Download the archive via HTTP, validate the checksum, and extract to third_party/opencensus-proto/src.
-  download_archive(
-    ${CMAKE_CURRENT_SOURCE_DIR}/third_party/opencensus-proto/src
-    https://storage.googleapis.com/grpc-bazel-mirror/github.com/census-instrumentation/opencensus-proto/archive/v0.3.0.tar.gz
-    b7e13f0b4259e80c3070b583c2f39e53153085a6918718b1c710caf7037572b0
-    opencensus-proto-0.3.0/src
-  )
-endif()
-if (NOT EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/third_party/opencensus-proto/src)
-  # Download the archive via HTTP, validate the checksum, and extract to third_party/opencensus-proto/src.
-  download_archive(
-    ${CMAKE_CURRENT_SOURCE_DIR}/third_party/opencensus-proto/src
-    https://github.com/census-instrumentation/opencensus-proto/archive/v0.3.0.tar.gz
-    b7e13f0b4259e80c3070b583c2f39e53153085a6918718b1c710caf7037572b0
-    opencensus-proto-0.3.0/src
-  )
-endif()
-# Setup external proto library at third_party/xds with 2 download URLs
-if (NOT EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/third_party/xds)
-  # Download the archive via HTTP, validate the checksum, and extract to third_party/xds.
-  download_archive(
-    ${CMAKE_CURRENT_SOURCE_DIR}/third_party/xds
-    https://storage.googleapis.com/grpc-bazel-mirror/github.com/cncf/xds/archive/e9ce68804cb4e64cab5a52e3c8baf840d4ff87b7.tar.gz
-    0d33b83f8c6368954e72e7785539f0d272a8aba2f6e2e336ed15fd1514bc9899
-    xds-e9ce68804cb4e64cab5a52e3c8baf840d4ff87b7
-  )
-endif()
-if (NOT EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/third_party/xds)
-  # Download the archive via HTTP, validate the checksum, and extract to third_party/xds.
-  download_archive(
-    ${CMAKE_CURRENT_SOURCE_DIR}/third_party/xds
-    https://github.com/cncf/xds/archive/e9ce68804cb4e64cab5a52e3c8baf840d4ff87b7.tar.gz
-    0d33b83f8c6368954e72e7785539f0d272a8aba2f6e2e336ed15fd1514bc9899
-    xds-e9ce68804cb4e64cab5a52e3c8baf840d4ff87b7
-  )
-endif()
-
 if(WIN32)
   set(_gRPC_BASELIB_LIBRARIES ws2_32 crypt32)
 endif()