diff --git a/tools/cross-toolchain/Dockerfile b/tools/cross-toolchain/Dockerfile
index e37464d345..75e72ac71a 100644
--- a/tools/cross-toolchain/Dockerfile
+++ b/tools/cross-toolchain/Dockerfile
@@ -11,7 +11,7 @@
 # docker build -t gcr.io/prysmaticlabs/rbe-worker:latest .
 # gcloud docker -- push gcr.io/prysmaticlabs/rbe-worker:latest 
 
-FROM debian:buster as build
+FROM debian:buster-slim as build
 
 # install gnu/gcc cross-build toolchain (gcc 8.3)
 ENV DOCKER_CLI_EXPERIMENTAL=enabled
diff --git a/tools/cross-toolchain/configs/clang/bazel_3.7.0/cc/module.modulemap b/tools/cross-toolchain/configs/clang/bazel_3.7.0/cc/module.modulemap
index e5097e5dcc..2486a46128 100755
--- a/tools/cross-toolchain/configs/clang/bazel_3.7.0/cc/module.modulemap
+++ b/tools/cross-toolchain/configs/clang/bazel_3.7.0/cc/module.modulemap
@@ -2113,7 +2113,6 @@ module "crosstool" [system] {
   textual header "/usr/include/iconv.h"
   textual header "/usr/include/ifaddrs.h"
   textual header "/usr/include/inttypes.h"
-  textual header "/usr/include/iproute2/bpf_elf.h"
   textual header "/usr/include/langinfo.h"
   textual header "/usr/include/lastlog.h"
   textual header "/usr/include/libgen.h"
diff --git a/tools/cross-toolchain/configs/clang/bazel_3.7.0/config/BUILD b/tools/cross-toolchain/configs/clang/bazel_3.7.0/config/BUILD
index 0781849f16..7c4ea88443 100644
--- a/tools/cross-toolchain/configs/clang/bazel_3.7.0/config/BUILD
+++ b/tools/cross-toolchain/configs/clang/bazel_3.7.0/config/BUILD
@@ -41,7 +41,7 @@ platform(
         "@bazel_tools//tools/cpp:clang",
     ],
     exec_properties = {
-        "container-image": "docker://gcr.io/prysmaticlabs/rbe-worker@sha256:d5fa14154811dff0886e4c808dc15f18c4bb8545a1ef3c53805a0db13564bdad",
+        "container-image": "docker://gcr.io/prysmaticlabs/rbe-worker@sha256:bd40e9a43b983c8b06079d14a0530100d6e1d59796616ca1d8b3902a197c97b1",
         "OSFamily": "Linux",
     },
 )
diff --git a/tools/cross-toolchain/configs/clang/bazel_3.7.0/prysm_toolchains/BUILD.bazel b/tools/cross-toolchain/configs/clang/bazel_3.7.0/prysm_toolchains/BUILD.bazel
index ba33afec89..3152f32662 100755
--- a/tools/cross-toolchain/configs/clang/bazel_3.7.0/prysm_toolchains/BUILD.bazel
+++ b/tools/cross-toolchain/configs/clang/bazel_3.7.0/prysm_toolchains/BUILD.bazel
@@ -84,8 +84,8 @@ cc_toolchain(
     name = "cc-mingw-amd64",
     all_files = ":empty",
     ar_files = ":empty",
-    as_files = ":mingw_compiler_files",
-    compiler_files = ":mingw_compiler_files",
+    as_files = ":empty",
+    compiler_files = ":empty",
     dwp_files = ":empty",
     linker_files = ":empty",
     objcopy_files = ":empty",
diff --git a/tools/cross-toolchain/configs/clang/bazel_3.7.0/prysm_toolchains/cc_toolchain_config_windows.bzl b/tools/cross-toolchain/configs/clang/bazel_3.7.0/prysm_toolchains/cc_toolchain_config_windows.bzl
index eb783208f0..69f3012d64 100755
--- a/tools/cross-toolchain/configs/clang/bazel_3.7.0/prysm_toolchains/cc_toolchain_config_windows.bzl
+++ b/tools/cross-toolchain/configs/clang/bazel_3.7.0/prysm_toolchains/cc_toolchain_config_windows.bzl
@@ -37,6 +37,7 @@ def _impl(ctx):
     action_configs = []
 
     install = "/usr/x86_64-w64-mingw32/"
+    gcc_libpath = "/usr/lib/gcc/x86_64-w64-mingw32/8.3-win32/"
     bin_prefix = "/usr/bin/x86_64-w64-mingw32-"
 
 
@@ -158,7 +159,10 @@ def _impl(ctx):
     ]
 
     cxx_builtin_include_directories = [
-        install +"include"
+        install +"include",
+        gcc_libpath +"include",
+        gcc_libpath +"include-fixed",
+        "/usr/share/mingw-w64/include/"
     ]
 
     artifact_name_patterns = [
diff --git a/tools/cross-toolchain/configs/versions.bzl b/tools/cross-toolchain/configs/versions.bzl
index c3667e93fe..ca71c4fc9d 100644
--- a/tools/cross-toolchain/configs/versions.bzl
+++ b/tools/cross-toolchain/configs/versions.bzl
@@ -4,8 +4,8 @@
 toolchain_config_spec0 = struct(config_repos = ["prysm_toolchains"], create_cc_configs = True, create_java_configs = True, env = {"BAZEL_COMPILER": "clang", "BAZEL_LINKLIBS": "-l%:libstdc++.a", "BAZEL_LINKOPTS": "-lm:-static-libgcc", "BAZEL_USE_LLVM_NATIVE_COVERAGE": "1", "GCOV": "llvm-profdata", "CC": "clang", "CXX": "clang++"}, java_home = "/usr/lib/jvm/java-8-openjdk-amd64", name = "clang")
 _TOOLCHAIN_CONFIG_SPECS = [toolchain_config_spec0]
 _BAZEL_TO_CONFIG_SPEC_NAMES = {"3.7.0": ["clang"]}
-LATEST = "sha256:d5fa14154811dff0886e4c808dc15f18c4bb8545a1ef3c53805a0db13564bdad"
-CONTAINER_TO_CONFIG_SPEC_NAMES = {"sha256:d5fa14154811dff0886e4c808dc15f18c4bb8545a1ef3c53805a0db13564bdad": ["clang"]}
+LATEST = "sha256:bd40e9a43b983c8b06079d14a0530100d6e1d59796616ca1d8b3902a197c97b1"
+CONTAINER_TO_CONFIG_SPEC_NAMES = {"sha256:bd40e9a43b983c8b06079d14a0530100d6e1d59796616ca1d8b3902a197c97b1": ["clang"]}
 _DEFAULT_TOOLCHAIN_CONFIG_SPEC = toolchain_config_spec0
 TOOLCHAIN_CONFIG_AUTOGEN_SPEC = struct(
         bazel_to_config_spec_names_map = _BAZEL_TO_CONFIG_SPEC_NAMES,
diff --git a/tools/cross-toolchain/rbe_toolchains_config.bzl b/tools/cross-toolchain/rbe_toolchains_config.bzl
index 04c10b93f6..e10736b2d0 100644
--- a/tools/cross-toolchain/rbe_toolchains_config.bzl
+++ b/tools/cross-toolchain/rbe_toolchains_config.bzl
@@ -3,7 +3,7 @@ load("@prysm//tools/cross-toolchain:configs/versions.bzl", _generated_toolchain_
 
 _PRYSM_BUILD_IMAGE_REGISTRY = "gcr.io"
 _PRYSM_BUILD_IMAGE_REPOSITORY = "prysmaticlabs/rbe-worker"
-_PRYSM_BUILD_IMAGE_DIGEST = "sha256:d5fa14154811dff0886e4c808dc15f18c4bb8545a1ef3c53805a0db13564bdad"
+_PRYSM_BUILD_IMAGE_DIGEST = "sha256:bd40e9a43b983c8b06079d14a0530100d6e1d59796616ca1d8b3902a197c97b1"
 _PRYSM_BUILD_IMAGE_JAVA_HOME = "/usr/lib/jvm/java-8-openjdk-amd64"
 _CONFIGS_OUTPUT_BASE = "tools/cross-toolchain/configs"