diff --git a/modules/buildbot/buildbot_nix.py b/modules/buildbot/buildbot_nix.py
index f83a10d..26b88c4 100644
--- a/modules/buildbot/buildbot_nix.py
+++ b/modules/buildbot/buildbot_nix.py
@@ -308,7 +308,7 @@ def nix_eval_config(
         steps.Git(
             logEnviron = False,
             repourl=url_with_secret,
-            method="clean",
+            method="clobber",
             submodules=True,
             haltOnFailure=True,
         )