1 files changed, 1 insertions, 1 deletions

diff --git a/bitbake/lib/toaster/orm/models.py b/bitbake/lib/toaster/orm/models.py
index 9a4db1e856..4f8510c4ec 100644
--- a/bitbake/lib/toaster/orm/models.py
+++ b/bitbake/lib/toaster/orm/models.py
@@ -1742,7 +1742,7 @@ def invalidate_cache(**kwargs):
 def signal_runbuilds():
     """Send SIGUSR1 to runbuilds process"""
     try:
-        with open(os.path.join(os.getenv('BUILDDIR'),
+        with open(os.path.join(os.getenv('BUILDDIR', '.'),
                                '.runbuilds.pid')) as pidf:
             os.kill(int(pidf.read()), SIGUSR1)
     except FileNotFoundError: