diff --git a/DEPS b/DEPS
index 7aa823f..e319484 100644
--- a/DEPS
+++ b/DEPS
@@ -272,11 +272,24 @@
                '--arch=x64'],
   },
   {
+    # Case-insensitivity for the Win SDK. Must run before win_toolchain below.
+    'name': 'ciopfs_linux',
+    'pattern': '.',
+    'condition': 'checkout_win and host_os == "linux"',
+    'action': [ 'python',
+                'pdfium/third_party/depot_tools/download_from_google_storage.py',
+                '--no_resume',
+                '--no_auth',
+                '--bucket', 'chromium-browser-clang/ciopfs',
+                '-s', 'pdfium/build/ciopfs.sha1',
+    ]
+  },
+  {
     # Update the Windows toolchain if necessary.
     'name': 'win_toolchain',
     'pattern': '.',
     'condition': 'checkout_win',
-    'action': ['vpython', 'pdfium/build/vs_toolchain.py', 'update', '--force'],
+    'action': ['python', 'pdfium/build/vs_toolchain.py', 'update', '--force'],
   },
   {
     # Update the Mac toolchain if necessary.