diff --git a/iso/empanadas/empanadas/util/iso_utils.py b/iso/empanadas/empanadas/util/iso_utils.py
index d3a8d41..cb48331 100644
--- a/iso/empanadas/empanadas/util/iso_utils.py
+++ b/iso/empanadas/empanadas/util/iso_utils.py
@@ -294,7 +294,7 @@ class IsoBuild:
                 builddir=self.mock_work_root,
                 lorax_work_root=self.lorax_result_root,
                 bugurl=self.bugurl,
-                squashfs_only=self.iso_map['lorax']['squashfs_only'],
+                squashfs_only=self.iso_map['lorax'].get('squashfs_only', None),
         )
 
         with open(mock_iso_path, "w+") as mock_iso_entry: