diff --git a/tools/internal_ci/macos/grpc_build_artifacts.sh b/tools/internal_ci/macos/grpc_build_artifacts.sh
index f4a7708e71e..9bf987c532e 100755
--- a/tools/internal_ci/macos/grpc_build_artifacts.sh
+++ b/tools/internal_ci/macos/grpc_build_artifacts.sh
@@ -18,6 +18,9 @@ set -ex
 # change to grpc repo root
 cd $(dirname $0)/../../..
 
+export PREPARE_BUILD_INSTALL_DEPS_CSHARP=true
+export PREPARE_BUILD_INSTALL_DEPS_PYTHON=true
+export PREPARE_BUILD_INSTALL_DEPS_RUBY=true
 source tools/internal_ci/helper_scripts/prepare_build_macos_rc
 
 # install cython for all python versions
diff --git a/tools/internal_ci/macos/grpc_distribtests.sh b/tools/internal_ci/macos/grpc_distribtests.sh
index eb256d92ee8..ec51a51e56c 100644
--- a/tools/internal_ci/macos/grpc_distribtests.sh
+++ b/tools/internal_ci/macos/grpc_distribtests.sh
@@ -18,6 +18,7 @@ set -ex
 # change to grpc repo root
 cd $(dirname $0)/../../..
 
+export PREPARE_BUILD_INSTALL_DEPS_CSHARP=true
 source tools/internal_ci/helper_scripts/prepare_build_macos_rc
 
 # Move packages generated by the previous step in the build chain.