diff --git a/gsutil.py b/gsutil.py
index 7642625b3..ffdf9cb9f 100755
--- a/gsutil.py
+++ b/gsutil.py
@@ -260,10 +260,13 @@ def run_gsutil(target, args, clean=False):
 
     # Notify user that their .boto file might be outdated.
     if b'Your credentials are invalid.' in p.stderr:
+      # Make sure this error message is visible when invoked by gclient runhooks
+      separator = '*' * 80
       print(
+          '\n' + separator + '\n' +
           'Warning: You might have an outdated .boto file. If this issue '
           'persists after running `gsutil.py config`, try removing your '
-          '.boto file.',
+          '.boto file.\n' + separator + '\n',
           file=sys.stderr)
 
     _print_subprocess_result(p)
diff --git a/win_toolchain/get_toolchain_if_necessary.py b/win_toolchain/get_toolchain_if_necessary.py
index aa556cba4..6b25ad7e7 100755
--- a/win_toolchain/get_toolchain_if_necessary.py
+++ b/win_toolchain/get_toolchain_if_necessary.py
@@ -26,7 +26,6 @@ import hashlib
 import filecmp
 import json
 import os
-import platform
 import shutil
 import subprocess
 import sys
@@ -257,7 +256,11 @@ def CanAccessToolchainBucket():
   """Checks whether the user has access to gs://chrome-wintoolchain/."""
   gsutil = download_from_google_storage.Gsutil(
       download_from_google_storage.GSUTIL_DEFAULT_PATH, boto_path=None)
-  code, _, _ = gsutil.check_call('ls', 'gs://chrome-wintoolchain/')
+  code, stdout, stderr = gsutil.check_call('ls', 'gs://chrome-wintoolchain/')
+  if code != 0:
+    # Make sure any error messages are made visible to the user.
+    print(stderr, file=sys.stderr, end='')
+    print(stdout, end='')
   return code == 0