diff --git a/Utilities/build-using-self b/Utilities/build-using-self
index 0cf187e939f..7e105faa1ae 100755
--- a/Utilities/build-using-self
+++ b/Utilities/build-using-self
@@ -141,6 +141,7 @@ def set_environment(
     swiftpm_bin_dir: pathlib.Path,
 ) -> None:
     os.environ["SWIFTCI_IS_SELF_HOSTED"] = "1"
+    os.environ["SWIFTCI_USE_LOCAL_DEPS"] = "1"
 
     # Ensure SDKROOT is configure
     if is_on_darwin():