1 files changed, 3 insertions, 1 deletions
diff --git a/src/bootstrap/builder.rs b/src/bootstrap/builder.rs
index 74b9978a837..1b74e7c41e7 100644
--- a/src/bootstrap/builder.rs
+++ b/src/bootstrap/builder.rs
@@ -759,7 +759,9 @@ impl<'a> Builder<'a> {
         // be resolved because MinGW has the import library. The downside is we
         // don't get newer functions from Windows, but we don't use any of them
         // anyway.
-        cargo.env("WINAPI_NO_BUNDLED_LIBRARIES", "1");
+        if mode != Mode::Tool {
+            cargo.env("WINAPI_NO_BUNDLED_LIBRARIES", "1");
+        }
 
         if self.is_very_verbose() {
             cargo.arg("-v");