diff --git a/tools/gn/bootstrap/bootstrap.py b/tools/gn/bootstrap/bootstrap.py
index bf0afb7..7fa9f04 100755
--- a/tools/gn/bootstrap/bootstrap.py
+++ b/tools/gn/bootstrap/bootstrap.py
@@ -129,7 +129,9 @@
        toolchain_paths["vs_path"],
        toolchain_paths["sdk_path"],
        toolchain_paths["runtime_dirs"],
+       "win",
        "x64",
+       "environment.x64",
        "true"
       ],
       cwd=tempdir)