diff --git a/templates/tools/dockerfile/grpc_clang_format/Dockerfile.template b/templates/tools/dockerfile/grpc_clang_format/Dockerfile.template
index e800038b2fc..4f9e42ec28f 100644
--- a/templates/tools/dockerfile/grpc_clang_format/Dockerfile.template
+++ b/templates/tools/dockerfile/grpc_clang_format/Dockerfile.template
@@ -14,7 +14,7 @@
   # See the License for the specific language governing permissions and
   # limitations under the License.
 
-  FROM debian:bullseye
+  FROM debian:11
 
   # Install clang-format
   RUN apt-get update && apt-get install -y clang-format-11
diff --git a/templates/tools/dockerfile/grpc_clang_tidy/Dockerfile.template b/templates/tools/dockerfile/grpc_clang_tidy/Dockerfile.template
index 829bb4269db..bca4243459d 100644
--- a/templates/tools/dockerfile/grpc_clang_tidy/Dockerfile.template
+++ b/templates/tools/dockerfile/grpc_clang_tidy/Dockerfile.template
@@ -14,7 +14,7 @@
   # See the License for the specific language governing permissions and
   # limitations under the License.
   
-  FROM debian:bullseye
+  FROM debian:11
   
   # Install clang-tidy 11
   RUN apt-get update && apt-get install -y clang-tidy-11 jq git
diff --git a/templates/tools/dockerfile/grpc_iwyu/Dockerfile.template b/templates/tools/dockerfile/grpc_iwyu/Dockerfile.template
index f31c4b658e2..58e12b7e678 100644
--- a/templates/tools/dockerfile/grpc_iwyu/Dockerfile.template
+++ b/templates/tools/dockerfile/grpc_iwyu/Dockerfile.template
@@ -14,7 +14,7 @@
   # See the License for the specific language governing permissions and
   # limitations under the License.
   
-  FROM debian:bullseye
+  FROM debian:11
   
   RUN apt-get update && apt-get install -y clang-11 llvm-11-dev libclang-11-dev clang-format-11 jq git cmake python
   
diff --git a/templates/tools/dockerfile/interoptest/grpc_interop_python/Dockerfile.template b/templates/tools/dockerfile/interoptest/grpc_interop_python/Dockerfile.template
index 0ab69691882..9a3695f07a4 100644
--- a/templates/tools/dockerfile/interoptest/grpc_interop_python/Dockerfile.template
+++ b/templates/tools/dockerfile/interoptest/grpc_interop_python/Dockerfile.template
@@ -22,4 +22,4 @@
   <%include file="../../gcp_api_libraries.include"/>
 
   <%include file="../../cmake.include"/>
-  <%include file="../../ccache.include"/>
\ No newline at end of file
+  <%include file="../../ccache.include"/>
diff --git a/templates/tools/dockerfile/python_debian11_base.include b/templates/tools/dockerfile/python_debian11_base.include
index 4f79aeca94b..45326589c8a 100644
--- a/templates/tools/dockerfile/python_debian11_base.include
+++ b/templates/tools/dockerfile/python_debian11_base.include
@@ -1,4 +1,4 @@
-FROM debian:bullseye
+FROM debian:11
   
 <%include file="./apt_get_basic.include"/>
 <%include file="./run_tests_addons.include"/>
diff --git a/tools/dockerfile/grpc_clang_format/Dockerfile b/tools/dockerfile/grpc_clang_format/Dockerfile
index bb8979ed19a..e87523abd9f 100644
--- a/tools/dockerfile/grpc_clang_format/Dockerfile
+++ b/tools/dockerfile/grpc_clang_format/Dockerfile
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM debian:bullseye
+FROM debian:11
 
 # Install clang-format
 RUN apt-get update && apt-get install -y clang-format-11
diff --git a/tools/dockerfile/grpc_clang_tidy/Dockerfile b/tools/dockerfile/grpc_clang_tidy/Dockerfile
index 5797237cb9f..fb61cf514ce 100644
--- a/tools/dockerfile/grpc_clang_tidy/Dockerfile
+++ b/tools/dockerfile/grpc_clang_tidy/Dockerfile
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM debian:bullseye
+FROM debian:11
 
 # Install clang-tidy 11
 RUN apt-get update && apt-get install -y clang-tidy-11 jq git
diff --git a/tools/dockerfile/grpc_iwyu/Dockerfile b/tools/dockerfile/grpc_iwyu/Dockerfile
index c6b9a75b3b6..2bb0ac465da 100644
--- a/tools/dockerfile/grpc_iwyu/Dockerfile
+++ b/tools/dockerfile/grpc_iwyu/Dockerfile
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM debian:bullseye
+FROM debian:11
 
 RUN apt-get update && apt-get install -y clang-11 llvm-11-dev libclang-11-dev clang-format-11 jq git cmake python
 
diff --git a/tools/dockerfile/interoptest/grpc_interop_python/Dockerfile b/tools/dockerfile/interoptest/grpc_interop_python/Dockerfile
index b42fc13848c..ffab0474c6c 100644
--- a/tools/dockerfile/interoptest/grpc_interop_python/Dockerfile
+++ b/tools/dockerfile/interoptest/grpc_interop_python/Dockerfile
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM debian:bullseye
+FROM debian:11
   
 #=================
 # Basic C core dependencies
@@ -87,3 +87,4 @@ RUN curl -sSL -o ccache.tar.gz https://github.com/ccache/ccache/releases/downloa
     && make -j4 && make install \
     && cd ../.. \
     && rm -rf ccache-4.5.1 ccache.tar.gz
+
diff --git a/tools/dockerfile/interoptest/grpc_interop_pythonasyncio/Dockerfile b/tools/dockerfile/interoptest/grpc_interop_pythonasyncio/Dockerfile
index 2b481570932..80825970cf0 100644
--- a/tools/dockerfile/interoptest/grpc_interop_pythonasyncio/Dockerfile
+++ b/tools/dockerfile/interoptest/grpc_interop_pythonasyncio/Dockerfile
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM debian:bullseye
+FROM debian:11
   
 #=================
 # Basic C core dependencies
diff --git a/tools/dockerfile/test/python_debian11_default_x64/Dockerfile b/tools/dockerfile/test/python_debian11_default_x64/Dockerfile
index ce2c88c5317..4c5da0a95a2 100644
--- a/tools/dockerfile/test/python_debian11_default_x64/Dockerfile
+++ b/tools/dockerfile/test/python_debian11_default_x64/Dockerfile
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM debian:bullseye
+FROM debian:11
   
 #=================
 # Basic C core dependencies
diff --git a/tools/internal_ci/helper_scripts/prepare_ccache_symlinks_rc b/tools/internal_ci/helper_scripts/prepare_ccache_symlinks_rc
index 36e5a898f59..ec06363cec5 100644
--- a/tools/internal_ci/helper_scripts/prepare_ccache_symlinks_rc
+++ b/tools/internal_ci/helper_scripts/prepare_ccache_symlinks_rc
@@ -15,8 +15,7 @@
 
 # Source this rc script to create symlinks to ccache
 
-# TODO: handle values like "0", "false" etc.
-if [ "${GRPC_BUILD_ENABLE_CCACHE}" != "" ]
+if [ "${GRPC_BUILD_ENABLE_CCACHE}" != "" ] && [ "${GRPC_BUILD_ENABLE_CCACHE}" != "false" ] && [ "${GRPC_BUILD_ENABLE_CCACHE}" != "0" ]
 then
   if [ -x "$(command -v ccache)" ]
   then
diff --git a/tools/internal_ci/linux/grpc_distribtests_csharp.sh b/tools/internal_ci/linux/grpc_distribtests_csharp.sh
index 9c4f710ddda..011d62d26da 100755
--- a/tools/internal_ci/linux/grpc_distribtests_csharp.sh
+++ b/tools/internal_ci/linux/grpc_distribtests_csharp.sh
@@ -28,6 +28,9 @@ source tools/internal_ci/helper_scripts/prepare_build_linux_rc
 # under qemu emulator.
 source tools/internal_ci/helper_scripts/prepare_qemu_rc
 
+# configure ccache
+source tools/internal_ci/helper_scripts/prepare_ccache_rc
+
 # Build all C# linux artifacts
 tools/run_tests/task_runner.py -f artifact linux csharp ${TASK_RUNNER_EXTRA_FILTERS} -j 4 --inner_jobs 8 -x build_artifacts_csharp/sponge_log.xml || FAILED="true"
 
diff --git a/tools/internal_ci/linux/grpc_distribtests_ruby.sh b/tools/internal_ci/linux/grpc_distribtests_ruby.sh
index be73cdd3071..d91174430e7 100755
--- a/tools/internal_ci/linux/grpc_distribtests_ruby.sh
+++ b/tools/internal_ci/linux/grpc_distribtests_ruby.sh
@@ -26,6 +26,9 @@ source tools/internal_ci/helper_scripts/prepare_build_linux_rc
 # prerequisites for ruby artifact build on linux
 source tools/internal_ci/helper_scripts/prepare_build_linux_ruby_artifact_rc
 
+# configure ccache
+source tools/internal_ci/helper_scripts/prepare_ccache_rc
+
 # Build all ruby linux artifacts (this step actually builds all the binary wheels and source archives)
 tools/run_tests/task_runner.py -f artifact linux ruby ${TASK_RUNNER_EXTRA_FILTERS} -j 6 --inner_jobs 6 -x build_artifacts/sponge_log.xml || FAILED="true"