diff --git a/scripts/build-local.py b/scripts/build-local.py
index 23c760cf..3d91a0b9 100755
--- a/scripts/build-local.py
+++ b/scripts/build-local.py
@@ -164,6 +164,8 @@ def interrupt_handler(_signum, _frame):
                 distro = 'fedora'
             elif 'openSUSE' in url:
                 distro = 'opensuse'
+            else:
+                raise RuntimeError(f"URL ('{url}') was not handled?")
             cfg_str = cfg_str.replace(url, distro)
         specific_output_dir = Path(output_dir, toolchain, target_arch, cfg_str)
         specific_output_dir.mkdir(exist_ok=True, parents=True)