diff --git a/toolchain/win/setup_toolchain.py b/toolchain/win/setup_toolchain.py
index e0b7c03..64e112c 100644
--- a/toolchain/win/setup_toolchain.py
+++ b/toolchain/win/setup_toolchain.py
@@ -148,7 +148,7 @@ def _LoadToolchainEnv(cpu, toolchain_root, sdk_dir, target_store):
       assert _LowercaseDict(json_env) == _LowercaseDict(cmd_env)
   else:
     if 'GYP_MSVS_OVERRIDE_PATH' not in os.environ:
-      os.environ['GYP_MSVS_OVERRIDE_PATH'] = _DetectVisualStudioPath()
+      os.environ['GYP_MSVS_OVERRIDE_PATH'] = toolchain_root
     # We only support x64-hosted tools.
     script_path = os.path.normpath(
         os.path.join(os.environ['GYP_MSVS_OVERRIDE_PATH'], 'VC/vcvarsall.bat'))